Fireware Os
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Remote, unauthenticated requests to the WatchGuard Fireware OS authentication login interface can crash the management daemon, producing a denial of service on affected Firebox appliances. The root cause is a NULL pointer dereference (CWE-476) triggered by a specially crafted request to the login endpoint; impact is confined to availability of the management daemon, with no confidentiality or integrity loss and no code execution. Exploitation requires only network reachability to the management/authentication interface (assessed CVSS:3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H), and no public exploit code or confirmed active exploitation has been identified at time of analysis (the CVE is not listed in CISA KEV). The published score of 8.7 reflects the CVSS 4.0 vector, while the independent assessment treats this as a genuine but bounded availability risk whose real-world severity hinges on how widely the login interface is exposed.
Denial of service in WatchGuard Fireware OS allows a remote, unauthenticated attacker to exhaust resources on the appliance by sending a specially crafted request to the login process known as wgagent. The affected code is part of the firewall's authentication/VPN interface, so any Firebox whose management or VPN portal is reachable from an untrusted network is exposed; exploitation is low-complexity and requires no credentials, as confirmed by the CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:N). Impact is bounded to availability and there is no confidentiality or integrity loss and no code execution; no public exploit code was identified in the available intelligence and there is no CISA KEV confirmation of active exploitation at time of analysis.
Authenticated attackers with administrator privileges can exploit a stack-based buffer overflow in the spamBlocker (spamd) service of WatchGuard Fireware OS by sending a specially crafted management request, causing a service crash or potentially achieving arbitrary code execution. The vulnerability requires the spamBlocker feature to be licensed and enabled, and the management plane to be reachable; exploitation is therefore limited to insiders, stolen admin credentials, or post-compromise scenarios. No public exploit code has been identified at the time of analysis.
Improper authorization in WatchGuard Fireware OS's SAML login flow lets an authenticated SAML user who is scoped only to the Access Portal obtain unauthorized Mobile VPN with SSL access by submitting a specially crafted login request. The assessed vector (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N) confirms this is a bounded privilege-escalation issue: the attacker must already hold a valid low-privilege SAML account, SAML authentication must be configured, the Access Portal must be exposed, and Mobile VPN with SSL must be provisioned (PR:L, AT:P), with no user interaction required. No public exploit code and no CISA KEV entry were identified at time of analysis.
Arbitrary code execution in WatchGuard Fireware OS is possible through its SAML single sign-on session daemon (samld), which deserializes session files it is asked to load without adequately validating their contents. The attacker must already be authenticated with high privileges (CVSS 4.0 vector PR:H) and must already be able to write files on the appliance, since the vector's AT:P metric and the description both indicate a required prior condition - this is a second-stage, post-foothold vulnerability rather than a standalone remote compromise. Exploitation yields code execution in the security context of the samld service, with high confidentiality, integrity and availability impact to that service but no demonstrated impact on subsequent systems (SC:N/SI:N/SA:N); no public exploit code and no confirmed active exploitation were identified at time of analysis.
Command injection as root in WatchGuard Fireware OS occurs through the BOVPN Over TLS client configuration handling, allowing whoever controls the remote TLS VPN peer to push malicious configuration data that the connecting Firebox executes with root privileges, compromising the appliance's confidentiality, integrity, and availability (CVSS 3.1 base 9.2, AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H). Exposure is conditional rather than blanket internet-facing: the Firebox must be configured as a BOVPN Over TLS client and must actively initiate a session to an attacker-operated or attacker-compromised server, so a successful attack implies a malicious or hijacked peer relationship rather than an opportunistic scan-and-exploit against any Firebox. No credentials on the Firebox are required (PR:N) and no interactive user action is needed once the client connection is made; there is no indication of confirmed active exploitation (CISA KEV) and no public exploit code identified at time of analysis, though the confirmed root-level impact on a perimeter security device justifies treating this as a high-priority patch item.
Path traversal in the WatchGuard Fireware OS WebUI management agent lets an authenticated administrator read or list arbitrary files on the local filesystem by submitting a specially crafted management request. Exploitation requires valid WebUI administrator credentials (the highest management privilege on the Firebox), per the assessed vector CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N, so the flaw is remote and low-complexity once the attacker already holds admin access, and the impact is limited to confidentiality (file read/list) with no write, code execution, or availability effect. No public exploit code and no confirmed active exploitation have been identified at time of analysis; the vendor advisory is published at https://psirt.watchguard.com/CVE-2026-13224 and no EPSS score was provided in the available data.
An integer underflow in the IKE daemon (iked) of WatchGuard Fireware OS can be triggered by a remote, unauthenticated attacker who has already completed the initial IKEv2 handshake, causing the iked process to crash and interrupting IPsec VPN service. Only Firebox appliances running Fireware OS with IKEv2 IPsec VPN enabled and reachable are exposed; the flaw is confined to availability (no confidentiality or integrity impact), and the practical blast radius is narrower than the 8.2 base score suggests because a valid IKEv2 session state must exist before the crafted encrypted message can be delivered. There is no public exploit identified at time of analysis, and no confirmed report of active exploitation. The vendor advisory is available at https://psirt.watchguard.com/CVE-2026-86133.
Authenticated low-privileged users - including read-only or guest administrator accounts - can crash the wgagent management daemon and read arbitrary files accessible to that daemon on WatchGuard Fireware OS by sending a specially crafted request to the management API's session initialization function, which is missing an authorization check. The attack is network-reachable and requires no user interaction, but it is gated behind a valid management-plane session at low privilege (PR:L), so exposure depends on how many such accounts exist and whether the management interface is reachable by the attacker. No public exploit code has been identified at time of analysis and the issue is not listed in CISA KEV; the availability impact (high) dominates the limited confidentiality loss, giving this a genuine but access-gated priority.
Denial of service of the diagnostic-tools subsystem in WatchGuard Fireware OS can be triggered by a low-privileged, authenticated user who repeatedly starts and aborts a specially crafted diagnostic task through the management web UI. The authentication requirement (PR:L per the supplied vector) and the subsystem-confined blast radius, which does not reach the firewall's core traffic-processing functions, keep this a genuine but modest-priority issue rather than a device-wide outage; no public exploit code has been identified at time of analysis and no KEV listing is present in the intelligence. Note that the vendor's CVSS 4.0 score of 7.1 records high availability impact (VA:H) on the product, while our independent assessment scores availability as low (CVSS 3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L) because the resource exhaustion is limited to the diagnostic tooling.
Missing authorization in the wgagent management daemon of WatchGuard Fireware OS allows an authenticated, low-privileged management account - including read-only or guest administrator roles - to crash the daemon and read files accessible to its process by sending a crafted request to the management API. The weakness sits in the daemon's session-initialization function, which fails to enforce proper privilege validation before handling attacker-controlled input; the associated path-traversal class (CWE-22) is what enables the arbitrary file read, while the crash produces a denial-of-service condition against the agent. Exploitation requires a valid management session and network reachability to the management plane (CVSS 4.0: 7.1, PR:L, VA:H, VC:L), so risk concentrates on Fireboxes with exposed or broadly accessible management interfaces, multi-admin/multi-tenant deployments, and environments where guest or read-only admin accounts are provisioned. No public exploit code has been identified at time of analysis and the issue is not listed in CISA KEV.
Remote, unauthenticated denial of service in WatchGuard Fireware OS: an integer underflow (CWE-191) in the IKEv2 daemon (iked) is triggered when a remote attacker sends a specially crafted encrypted IKEv2 message within a session negotiated with an AES-GCM cipher suite, causing the daemon process to crash. Affected are Fireware OS deployments that terminate IPsec/IKEv2 VPNs on an interface reachable by the attacker - most commonly the WAN interface - and that offer or negotiate AES-GCM for IKEv2; deployments that do not use AES-GCM for IKEv2 are not on the vulnerable path. The attack requires no authentication and no user interaction, but impact is confined to availability (CVSS 4.0 VA:H with VC:N/VI:N and no subsequent-system impact), with no code execution or data disclosure; no public exploit code has been identified at time of analysis and the change is not reported as confirmed actively exploited (CISA KEV) in the available intelligence.
Denial of service in WatchGuard Fireware OS lets remote, unauthenticated attackers crash the appliance by delivering a specially crafted IPv6 packet into its NetFlow packet-processing path, triggering a NULL pointer dereference (CWE-476). The flaw is availability-only (vendor CVSS 4.0 base 8.2, with VA:H and no confidentiality or integrity impact) and requires that NetFlow processing is actually configured and reachable over IPv6, so exposure is limited to deployments that enable that feature rather than to every Firebox. No public exploit code and no confirmed active exploitation were identified at time of analysis, and no EPSS signal was supplied; the practical risk is a repeatable remote crash of a perimeter device, which is still serious because a reboot or failover is required to restore service.
Unauthenticated code execution is possible on WatchGuard Fireware OS through its DHCP fingerprinting daemon (fingerd), which overflows a fixed-size stack buffer when it parses a specially crafted DHCP packet. An attacker only needs Layer 2 adjacency to a Firebox interface whose DHCP-processing path reaches fingerd - the same broadcast domain or VLAN - with no credentials (PR:N) and no user interaction (UI:N); the adjacency requirement keeps this off the internet-attackable surface, since it cannot be triggered across a routed boundary. Successful exploitation yields full compromise of the daemon's process context (high confidentiality, integrity, and availability impact per the assessed vector), with the process crash as the minimum outcome; no public exploit code has been identified at time of analysis and the flaw is not reported as confirmed actively exploited (CISA KEV).
Remote code execution in WatchGuard Fireware OS affects the iked IKE/IPsec VPN daemon, where a memory-safety defect lets a remote unauthenticated attacker run arbitrary code by sending specially crafted network traffic to the appliance's VPN listener. The CVSS 4.0 base score of 9.3 reflects network-reachable, no-privilege, no-interaction exploitation with high confidentiality, integrity, and availability impact. No public exploit is identified at time of analysis and it is not listed in CISA KEV, but the pre-authentication RCE profile on an internet-facing firewall makes this high priority.
Remote unauthenticated denial-of-service in WatchGuard Fireware OS targets the iked process, which handles IKE-based VPN session negotiation. By sending specially crafted network packets to the IKE service, an attacker can trigger an integer underflow in iked, crashing VPN processing and disrupting all VPN-dependent connectivity without any authentication. No public exploit code has been identified at time of analysis, and this vulnerability is not currently listed in the CISA KEV catalog.
Out-of-bounds read in the WatchGuard Fireware OS iked (Internet Key Exchange daemon) process enables remote unauthenticated attackers to crash VPN processing by sending specially crafted network traffic, resulting in a Denial of Service condition. All Fireware OS versions appear affected per the wildcard CPE, and the vulnerability is reachable without authentication from any network path to the iked listener. No public exploit code or CISA KEV listing has been identified at time of analysis, but the low attack complexity makes this a realistic target for disrupting VPN availability on WatchGuard appliances.
Integer underflow in WatchGuard Fireware OS iked (IKE daemon) process enables remote unauthenticated attackers to crash VPN processing by sending specially crafted network traffic. The flaw (CWE-191) resides in the IKEv1/IKEv2 key exchange handler, meaning any internet-exposed WatchGuard appliance with VPN enabled is reachable from the network perimeter without credentials. No public exploit code or CISA KEV listing has been identified at time of analysis, but the unauthenticated network attack vector and availability impact of 8.7 (CVSS 4.0) make this a meaningful risk for organizations relying on WatchGuard VPN for remote access continuity.
Stack-based buffer overflow in the iked (IKE daemon) process of WatchGuard Fireware OS allows a remote unauthenticated attacker to crash VPN processing via specially crafted network traffic, causing a denial-of-service condition on affected Firebox appliances. Any Firebox with IPsec VPN exposed to untrusted networks is at risk across an unspecified range of Fireware OS versions. No public exploit code has been identified at time of analysis, but the CVSS 4.0 score of 8.7 with network-accessible, zero-authentication exploitation reflects meaningful operational urgency for perimeter security devices.
Remote code execution in WatchGuard Fireware OS affects the epm (Endpoint Protection Manager) service tied to the deprecated Mobile Security feature, where a stack-based buffer overflow lets an unauthenticated remote attacker run arbitrary code on the appliance. The CVSS 4.0 base score is 9.3 (critical) with a network, no-privilege, no-interaction vector. No public exploit identified at time of analysis and it is not listed in CISA KEV, but as a perimeter firewall RCE the impact is severe for any deployment still running Mobile Security.
Remote code execution in WatchGuard Fireware OS is possible via a heap overflow (CWE-122) in the iked (IKE/IPsec key management) process, letting a remote unauthenticated attacker run arbitrary code by sending specially crafted network traffic to an affected Firebox firewall. The vendor-assigned CVSS 4.0 base score is 9.3 (critical), reflecting network-reachable, no-privilege, no-interaction exploitation with full confidentiality, integrity, and availability impact. There is no public exploit identified at time of analysis and the CVE is not in CISA KEV, but the pre-authentication nature and the perimeter role of the affected device make this a high-priority patching item.
Remote unauthenticated attackers can crash the VPN processing service on WatchGuard Fireware OS by sending specially crafted IKE network traffic that triggers a double-free memory corruption in the iked daemon. The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:N/VA:H) confirms zero prerequisites for exploitation against any internet-exposed WatchGuard appliance with IPsec VPN active. No public exploit code has been identified at time of analysis, and the vulnerability does not appear in the CISA KEV catalog.
Out-of-bounds read in the WatchGuard Fireware OS iked (IKE daemon) process allows remote unauthenticated attackers to disrupt VPN operations by sending specially crafted network packets. The flaw resides in VPN processing logic and can crash or destabilize the IKE service, cutting off IPsec/IKEv2 tunnels for connected clients and sites. No public exploit has been identified at time of analysis and CISA KEV listing is not confirmed; however, the unauthenticated network attack vector and CVSS 4.0 score of 8.7 place this in the priority triage tier for organizations relying on WatchGuard Firebox VPN connectivity.
Remote code execution in WatchGuard Fireware OS affects the iked (IKE/IPsec VPN key-exchange) daemon, where a stack-based buffer overflow lets a remote, unauthenticated attacker run arbitrary code by sending specially crafted network traffic. Because iked terminates VPN negotiations at the network edge, any Firebox appliance exposing IKE/IPsec is reachable pre-authentication. No public exploit has been identified at time of analysis and the CVE is not listed in CISA KEV, but the pre-auth RCE profile on a perimeter security device makes this a top-priority patch.
Buffer overflow in the WatchGuard Fireware OS Management Web UI allows an authenticated administrator with network access to trigger a denial-of-service condition or potentially execute arbitrary code by submitting specially crafted traffic to the management interface. The root cause is CWE-787 (out-of-bounds write) in the web-based management component, and the CVSS 4.0 vector confirms network reachability with high-privilege authentication as prerequisites. No public exploit code or active exploitation has been identified at time of analysis, though the RCE potential on a network perimeter device elevates the severity beyond what the privilege requirement alone might suggest.
Authenticated command execution in WatchGuard Fireware OS lets a privileged administrator escalate a specially crafted CLI command into arbitrary code execution via an out-of-bounds write (CWE-787). The flaw affects a very broad version span (Fireware OS 11.0 through 11.12.4_Update1, 12.0 through 12.12, and 2025.1 through 2026.2), placing most currently and historically deployed WatchGuard Firebox appliances in scope. No public exploit identified at time of analysis and the issue is not listed in CISA KEV; the CVSS 4.0 score of 8.6 reflects full confidentiality/integrity/availability impact once the required privileged access is obtained.
Remote code execution in WatchGuard Fireware OS (the operating system powering Firebox network security appliances) allows an authenticated privileged administrator to run arbitrary code on the firewall by sending specially crafted requests to the Management Web UI, which trigger an out-of-bounds write in the networkd process. The flaw spans a wide version range (11.8 through 11.12.4_Update1, 12.0 through 12.12, and 2025.1 through 2026.2) and carries a CVSS 4.0 base score of 8.6 (High). It was reported by WatchGuard's own PSIRT; there is no public exploit identified at time of analysis and it is not listed in CISA KEV.
Arbitrary file write in the WatchGuard Fireware OS Management Web UI lets a privileged, authenticated administrator escape the intended directory and write files anywhere on a Firebox appliance's filesystem, per CVSS 4.0 (AV:N/PR:H). This affects Fireware OS across the 11.x, 12.x, and 2025.1-2026.2 branches and can be leveraged to tamper with configuration or system binaries, potentially leading to code execution or device compromise. There is no public exploit identified at time of analysis and it is not listed in CISA KEV.
Local privilege escalation in WatchGuard Mobile VPN with SSL client for Windows (versions up to and including 2026.2) lets an authenticated local attacker elevate from a low-privileged account to NT AUTHORITY\SYSTEM on any machine where the client is installed. The flaw is rooted in insecure permission assignment (CWE-732), and there is no public exploit identified at time of analysis, though the vendor-reported nature and full high-impact CVSS (7.3, CVSS 4.0) make it a meaningful endpoint-hardening concern.
Remote code execution in WatchGuard Fireware OS (the firmware powering WatchGuard Firebox firewall appliances) allows an unauthenticated attacker positioned on the same local/adjacent network segment to trigger an out-of-bounds write and execute arbitrary code. The flaw spans a wide firmware range - 11.0 through 11.12.4_Update1, 12.0 through 12.12, and 2025.1 through 2026.2 - and was self-reported by WatchGuard via its PSIRT. There is no public exploit identified at time of analysis and it is not listed in CISA KEV, but the network-adjacent, unauthenticated, high-impact profile makes it a serious perimeter-device concern.
Denial-of-service in WatchGuard Fireware OS lets a remote, unauthenticated attacker crash the IKEv2 VPN service by sending specially crafted IKEv2 messages that trigger a null pointer dereference (CWE-476). The flaw affects appliances running Mobile User VPN with IKEv2 or Branch Office VPN over IKEv2 with a dynamic gateway peer, spanning Fireware OS 11.10.2 through 2026.2. No public exploit identified at time of analysis; the CVSS 4.0 score of 8.7 reflects high availability impact with no confidentiality or integrity loss.
Remote code execution in WatchGuard Fireware OS affects Fireboxes running a Mobile User VPN with IKEv2 that authenticates against an external LDAP server. A race condition in the IKEv2 LDAP authentication path can be driven into a use-after-free (CWE-416) inside the iked daemon, letting a remote unauthenticated attacker execute arbitrary code in the context of that process. No public exploit identified at time of analysis, and the CVSS 4.0 base score of 9.2 is tempered by high attack complexity and a probabilistic attack requirement (AC:H/AT:P), reflecting the difficulty of reliably winning the race.
Firmware signature validation bypass in WatchGuard Fireware OS lets an authenticated administrator upload a tampered firmware image through the backup/restore feature and have it installed despite failing integrity checks. Affecting Fireware OS branches 11.0 through 11.12.4_Update1, 12.0 through 12.12, and 2025.1 through 2025.6.2, the flaw (CWE-347) enables persistent malicious code on the appliance. No public exploit identified at time of analysis and it is not listed in CISA KEV, but the high integrity/confidentiality/availability impact and the appliance's privileged network position make it significant.
Authenticated arbitrary code execution in WatchGuard Fireware OS (12.1-12.12 and 2025.1-2026.2) arises from an out-of-bounds write in the wgagent process, reachable when a privileged user sends specially crafted requests to the Management Web UI. A high-privilege attacker (or one who has compromised admin credentials) can corrupt memory to run code on the firewall appliance, undermining the security gateway itself. No public exploit has been identified at time of analysis, and the issue is not listed in CISA KEV.
Arbitrary code execution in WatchGuard Fireware OS (the firmware powering Firebox network security appliances) arises from an out-of-bounds write in the ikestubd process, reachable through the Management Web UI. An authenticated user holding privileged (administrative) access can send specially crafted requests to corrupt memory and execute code on the appliance. No public exploit identified at time of analysis and the issue is not listed in CISA KEV; risk is bounded by the requirement for existing privileged access.
Remote code execution in WatchGuard Fireware OS versions 12.6.1 through 12.11.8 and 2025.1 through 2026.1.2 allows privileged authenticated attackers to execute arbitrary code with elevated system privileges via path traversal in the Web UI. The vulnerability requires high-level administrative access (CVSS PR:H) but presents a direct RCE path once authenticated. WatchGuard self-reported this issue with an official advisory available. EPSS and KEV data not provided; no public exploit identified at time of analysis.
Cross-Site Request Forgery (CSRF) in WatchGuard Fireware OS WebUI allows remote attackers to trigger a denial-of-service condition against the Web UI by tricking an authenticated administrator into visiting a malicious webpage. This affects Fireware OS versions 11.8 through 11.12.4+541730, 12.0 through 12.11.8, and 2025.1 through 2026.1.2. The CVSS v4.0 score of 7.1 reflects high availability impact (VA:H) with no user authentication required (PR:N) but requiring user interaction (UI:P). No public exploit identified at time of analysis, though the attack complexity is low and the CSRF nature makes weaponization straightforward for adversaries targeting firewall administrators.
Insecure deserialization in WatchGuard Fireware OS enables local code execution as the portald user when combined with a filesystem write primitive. Affects Fireware OS versions 12.1 through 12.11.8 and 2025.1 through 2026.1.2 on platforms supporting Access Portal (excludes T-15/T-35 models). CVSS 8.4 severity reflects high impact but requires prior high-privilege local access and an existing write vulnerability to exploit. No public exploit identified at time of analysis, with EPSS data unavailable for risk probability assessment.
Authorization bypass in the WatchGuard Fireware OS Access Portal reverse proxy lets an authenticated, low-privileged portal user reach back-end web applications they are not entitled to by sending a specially crafted request for a resource they are authorized to access. Exploitation requires valid Access Portal credentials, the SSL clientless portal to be enabled and reachable, and a specific crafted-request condition (CVSS 4.0 AT:P), so this is a genuine but bounded access-control flaw rather than a pre-auth compromise path. Impact is primarily confidentiality: unauthorized read of other portal-published web applications, with limited integrity effects and no availability impact. No public exploit code or confirmed active exploitation was identified at time of analysis.
Heap-based buffer overflow in WatchGuard Fireware OS's iked process allows an authenticated administrator to crash the IKE daemon by saving a specially crafted configuration, resulting in denial of service and disruption of IPsec VPN services. The CVSS 4.0 score of 6.9 with PR:H reflects the high-privilege requirement, meaning exploitation is gated behind valid administrator credentials. No active exploitation has been identified (not in CISA KEV) and no public exploit code is known at time of analysis.
WatchGuard Fireware OS deployed in FireCluster high-availability configurations falls back to a static, hard-coded encryption key to protect saved Access Portal credentials under unspecified exception circumstances, meaning any actor who can retrieve those encrypted credential stores can decrypt them offline using the known firmware key. Affected builds span Fireware OS 12.1 through 12.12 and 2025.1 through 2026.2; standalone Fireboxes and devices without Access Portal support are explicitly out of scope. No public exploit has been identified at time of analysis and this vulnerability is not listed in the CISA KEV catalog, but CWE-798 class flaws become broadly exploitable once the static key is extracted from firmware through reverse engineering.
Stored XSS in WatchGuard Fireware OS's SIP Proxy module enables a high-privileged attacker to plant persistent malicious JavaScript that executes in the browsers of other privileged users who access affected management interface pages. Covering Fireware OS versions 12.0 through 12.12, 12.5 through 12.5.18, and 2025.1 through 2026.2, this CVE is explicitly disclosed as an additional, previously unmitigated attack path for CVE-2025-6947 - meaning organizations that applied the prior patch may incorrectly believe their exposure is closed. No public exploit has been identified at time of analysis and this vulnerability is not listed in the CISA KEV catalog.
Stored XSS in WatchGuard Fireware OS's spamBlocker module enables a high-privileged attacker to persist malicious JavaScript that executes in the browsers of other authenticated users viewing the affected management interface. This vulnerability is explicitly identified as an additional, unmitigated attack path bypassing the remediation applied for CVE-2025-1071, indicating the original fix was incomplete. The CVSS 4.0 vector scores this at 4.8 (Medium), with no confirmed active exploitation and no public exploit identified at time of analysis.
Stored cross-site scripting in WatchGuard Fireware OS's Autotask Technology Integration module allows a high-privileged attacker to inject persistent malicious scripts that execute in the browsers of other users who view the affected management interface pages. Affecting Fireware OS versions 12.4 through 12.12, 12.5 through 12.5.18, and 2025.1 through 2026.2, this flaw is explicitly described as an additional unmitigated attack path alongside the related CVE-2025-13938, suggesting prior remediation efforts were incomplete. No public exploit code or confirmed active exploitation has been identified at time of analysis.
Stored cross-site scripting in WatchGuard Fireware OS via the ConnectWise Technology Integration module allows a highly privileged attacker to inject persistent malicious scripts into the web management interface, which then execute in the browsers of other authenticated users who view the affected pages. This vulnerability is explicitly described as an additional, previously unmitigated attack path for CVE-2025-13937, indicating that the prior remediation was incomplete and a bypass exists. No public exploit code or CISA KEV listing has been identified at time of analysis, but the relationship to an earlier CVE suggests at least some organizational knowledge of the attack surface.
Stored XSS in WatchGuard Fireware OS's Tigerpaw Technology Integration module allows a high-privileged attacker to persist malicious scripts within the management interface, which then execute in the browsers of other authenticated users who visit the affected pages. Critically, this CVE is identified as an additional unmitigated attack path for CVE-2025-13936, indicating an incomplete remediation of a prior related XSS flaw in the same integration module. Affected versions span the 12.4, 12.5, and 2025.x/2026.x release trains; no public exploit or CISA KEV listing has been identified at time of analysis.
Denial-of-service in WatchGuard Fireware OS Management Web UI allows an authenticated administrator to crash the management service by submitting crafted input to the put_data endpoint, which performs unsafe deserialization of attacker-controlled data (CWE-502). The CVSS 4.0 vector (PR:H, VA:H) confirms that exploitation is restricted to administrator-level accounts and results in availability loss only - no confidentiality or integrity impact. No public exploit code and no CISA KEV listing have been identified at time of analysis, placing this firmly in the insider-threat and compromised-credential risk category.
Remote, unauthenticated requests to the WatchGuard Fireware OS authentication login interface can crash the management daemon, producing a denial of service on affected Firebox appliances. The root cause is a NULL pointer dereference (CWE-476) triggered by a specially crafted request to the login endpoint; impact is confined to availability of the management daemon, with no confidentiality or integrity loss and no code execution. Exploitation requires only network reachability to the management/authentication interface (assessed CVSS:3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H), and no public exploit code or confirmed active exploitation has been identified at time of analysis (the CVE is not listed in CISA KEV). The published score of 8.7 reflects the CVSS 4.0 vector, while the independent assessment treats this as a genuine but bounded availability risk whose real-world severity hinges on how widely the login interface is exposed.
Denial of service in WatchGuard Fireware OS allows a remote, unauthenticated attacker to exhaust resources on the appliance by sending a specially crafted request to the login process known as wgagent. The affected code is part of the firewall's authentication/VPN interface, so any Firebox whose management or VPN portal is reachable from an untrusted network is exposed; exploitation is low-complexity and requires no credentials, as confirmed by the CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:N). Impact is bounded to availability and there is no confidentiality or integrity loss and no code execution; no public exploit code was identified in the available intelligence and there is no CISA KEV confirmation of active exploitation at time of analysis.
Authenticated attackers with administrator privileges can exploit a stack-based buffer overflow in the spamBlocker (spamd) service of WatchGuard Fireware OS by sending a specially crafted management request, causing a service crash or potentially achieving arbitrary code execution. The vulnerability requires the spamBlocker feature to be licensed and enabled, and the management plane to be reachable; exploitation is therefore limited to insiders, stolen admin credentials, or post-compromise scenarios. No public exploit code has been identified at the time of analysis.
Improper authorization in WatchGuard Fireware OS's SAML login flow lets an authenticated SAML user who is scoped only to the Access Portal obtain unauthorized Mobile VPN with SSL access by submitting a specially crafted login request. The assessed vector (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N) confirms this is a bounded privilege-escalation issue: the attacker must already hold a valid low-privilege SAML account, SAML authentication must be configured, the Access Portal must be exposed, and Mobile VPN with SSL must be provisioned (PR:L, AT:P), with no user interaction required. No public exploit code and no CISA KEV entry were identified at time of analysis.
Arbitrary code execution in WatchGuard Fireware OS is possible through its SAML single sign-on session daemon (samld), which deserializes session files it is asked to load without adequately validating their contents. The attacker must already be authenticated with high privileges (CVSS 4.0 vector PR:H) and must already be able to write files on the appliance, since the vector's AT:P metric and the description both indicate a required prior condition - this is a second-stage, post-foothold vulnerability rather than a standalone remote compromise. Exploitation yields code execution in the security context of the samld service, with high confidentiality, integrity and availability impact to that service but no demonstrated impact on subsequent systems (SC:N/SI:N/SA:N); no public exploit code and no confirmed active exploitation were identified at time of analysis.
Command injection as root in WatchGuard Fireware OS occurs through the BOVPN Over TLS client configuration handling, allowing whoever controls the remote TLS VPN peer to push malicious configuration data that the connecting Firebox executes with root privileges, compromising the appliance's confidentiality, integrity, and availability (CVSS 3.1 base 9.2, AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H). Exposure is conditional rather than blanket internet-facing: the Firebox must be configured as a BOVPN Over TLS client and must actively initiate a session to an attacker-operated or attacker-compromised server, so a successful attack implies a malicious or hijacked peer relationship rather than an opportunistic scan-and-exploit against any Firebox. No credentials on the Firebox are required (PR:N) and no interactive user action is needed once the client connection is made; there is no indication of confirmed active exploitation (CISA KEV) and no public exploit code identified at time of analysis, though the confirmed root-level impact on a perimeter security device justifies treating this as a high-priority patch item.
Path traversal in the WatchGuard Fireware OS WebUI management agent lets an authenticated administrator read or list arbitrary files on the local filesystem by submitting a specially crafted management request. Exploitation requires valid WebUI administrator credentials (the highest management privilege on the Firebox), per the assessed vector CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N, so the flaw is remote and low-complexity once the attacker already holds admin access, and the impact is limited to confidentiality (file read/list) with no write, code execution, or availability effect. No public exploit code and no confirmed active exploitation have been identified at time of analysis; the vendor advisory is published at https://psirt.watchguard.com/CVE-2026-13224 and no EPSS score was provided in the available data.
An integer underflow in the IKE daemon (iked) of WatchGuard Fireware OS can be triggered by a remote, unauthenticated attacker who has already completed the initial IKEv2 handshake, causing the iked process to crash and interrupting IPsec VPN service. Only Firebox appliances running Fireware OS with IKEv2 IPsec VPN enabled and reachable are exposed; the flaw is confined to availability (no confidentiality or integrity impact), and the practical blast radius is narrower than the 8.2 base score suggests because a valid IKEv2 session state must exist before the crafted encrypted message can be delivered. There is no public exploit identified at time of analysis, and no confirmed report of active exploitation. The vendor advisory is available at https://psirt.watchguard.com/CVE-2026-86133.
Authenticated low-privileged users - including read-only or guest administrator accounts - can crash the wgagent management daemon and read arbitrary files accessible to that daemon on WatchGuard Fireware OS by sending a specially crafted request to the management API's session initialization function, which is missing an authorization check. The attack is network-reachable and requires no user interaction, but it is gated behind a valid management-plane session at low privilege (PR:L), so exposure depends on how many such accounts exist and whether the management interface is reachable by the attacker. No public exploit code has been identified at time of analysis and the issue is not listed in CISA KEV; the availability impact (high) dominates the limited confidentiality loss, giving this a genuine but access-gated priority.
Denial of service of the diagnostic-tools subsystem in WatchGuard Fireware OS can be triggered by a low-privileged, authenticated user who repeatedly starts and aborts a specially crafted diagnostic task through the management web UI. The authentication requirement (PR:L per the supplied vector) and the subsystem-confined blast radius, which does not reach the firewall's core traffic-processing functions, keep this a genuine but modest-priority issue rather than a device-wide outage; no public exploit code has been identified at time of analysis and no KEV listing is present in the intelligence. Note that the vendor's CVSS 4.0 score of 7.1 records high availability impact (VA:H) on the product, while our independent assessment scores availability as low (CVSS 3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L) because the resource exhaustion is limited to the diagnostic tooling.
Missing authorization in the wgagent management daemon of WatchGuard Fireware OS allows an authenticated, low-privileged management account - including read-only or guest administrator roles - to crash the daemon and read files accessible to its process by sending a crafted request to the management API. The weakness sits in the daemon's session-initialization function, which fails to enforce proper privilege validation before handling attacker-controlled input; the associated path-traversal class (CWE-22) is what enables the arbitrary file read, while the crash produces a denial-of-service condition against the agent. Exploitation requires a valid management session and network reachability to the management plane (CVSS 4.0: 7.1, PR:L, VA:H, VC:L), so risk concentrates on Fireboxes with exposed or broadly accessible management interfaces, multi-admin/multi-tenant deployments, and environments where guest or read-only admin accounts are provisioned. No public exploit code has been identified at time of analysis and the issue is not listed in CISA KEV.
Remote, unauthenticated denial of service in WatchGuard Fireware OS: an integer underflow (CWE-191) in the IKEv2 daemon (iked) is triggered when a remote attacker sends a specially crafted encrypted IKEv2 message within a session negotiated with an AES-GCM cipher suite, causing the daemon process to crash. Affected are Fireware OS deployments that terminate IPsec/IKEv2 VPNs on an interface reachable by the attacker - most commonly the WAN interface - and that offer or negotiate AES-GCM for IKEv2; deployments that do not use AES-GCM for IKEv2 are not on the vulnerable path. The attack requires no authentication and no user interaction, but impact is confined to availability (CVSS 4.0 VA:H with VC:N/VI:N and no subsequent-system impact), with no code execution or data disclosure; no public exploit code has been identified at time of analysis and the change is not reported as confirmed actively exploited (CISA KEV) in the available intelligence.
Denial of service in WatchGuard Fireware OS lets remote, unauthenticated attackers crash the appliance by delivering a specially crafted IPv6 packet into its NetFlow packet-processing path, triggering a NULL pointer dereference (CWE-476). The flaw is availability-only (vendor CVSS 4.0 base 8.2, with VA:H and no confidentiality or integrity impact) and requires that NetFlow processing is actually configured and reachable over IPv6, so exposure is limited to deployments that enable that feature rather than to every Firebox. No public exploit code and no confirmed active exploitation were identified at time of analysis, and no EPSS signal was supplied; the practical risk is a repeatable remote crash of a perimeter device, which is still serious because a reboot or failover is required to restore service.
Unauthenticated code execution is possible on WatchGuard Fireware OS through its DHCP fingerprinting daemon (fingerd), which overflows a fixed-size stack buffer when it parses a specially crafted DHCP packet. An attacker only needs Layer 2 adjacency to a Firebox interface whose DHCP-processing path reaches fingerd - the same broadcast domain or VLAN - with no credentials (PR:N) and no user interaction (UI:N); the adjacency requirement keeps this off the internet-attackable surface, since it cannot be triggered across a routed boundary. Successful exploitation yields full compromise of the daemon's process context (high confidentiality, integrity, and availability impact per the assessed vector), with the process crash as the minimum outcome; no public exploit code has been identified at time of analysis and the flaw is not reported as confirmed actively exploited (CISA KEV).
Remote code execution in WatchGuard Fireware OS affects the iked IKE/IPsec VPN daemon, where a memory-safety defect lets a remote unauthenticated attacker run arbitrary code by sending specially crafted network traffic to the appliance's VPN listener. The CVSS 4.0 base score of 9.3 reflects network-reachable, no-privilege, no-interaction exploitation with high confidentiality, integrity, and availability impact. No public exploit is identified at time of analysis and it is not listed in CISA KEV, but the pre-authentication RCE profile on an internet-facing firewall makes this high priority.
Remote unauthenticated denial-of-service in WatchGuard Fireware OS targets the iked process, which handles IKE-based VPN session negotiation. By sending specially crafted network packets to the IKE service, an attacker can trigger an integer underflow in iked, crashing VPN processing and disrupting all VPN-dependent connectivity without any authentication. No public exploit code has been identified at time of analysis, and this vulnerability is not currently listed in the CISA KEV catalog.
Out-of-bounds read in the WatchGuard Fireware OS iked (Internet Key Exchange daemon) process enables remote unauthenticated attackers to crash VPN processing by sending specially crafted network traffic, resulting in a Denial of Service condition. All Fireware OS versions appear affected per the wildcard CPE, and the vulnerability is reachable without authentication from any network path to the iked listener. No public exploit code or CISA KEV listing has been identified at time of analysis, but the low attack complexity makes this a realistic target for disrupting VPN availability on WatchGuard appliances.
Integer underflow in WatchGuard Fireware OS iked (IKE daemon) process enables remote unauthenticated attackers to crash VPN processing by sending specially crafted network traffic. The flaw (CWE-191) resides in the IKEv1/IKEv2 key exchange handler, meaning any internet-exposed WatchGuard appliance with VPN enabled is reachable from the network perimeter without credentials. No public exploit code or CISA KEV listing has been identified at time of analysis, but the unauthenticated network attack vector and availability impact of 8.7 (CVSS 4.0) make this a meaningful risk for organizations relying on WatchGuard VPN for remote access continuity.
Stack-based buffer overflow in the iked (IKE daemon) process of WatchGuard Fireware OS allows a remote unauthenticated attacker to crash VPN processing via specially crafted network traffic, causing a denial-of-service condition on affected Firebox appliances. Any Firebox with IPsec VPN exposed to untrusted networks is at risk across an unspecified range of Fireware OS versions. No public exploit code has been identified at time of analysis, but the CVSS 4.0 score of 8.7 with network-accessible, zero-authentication exploitation reflects meaningful operational urgency for perimeter security devices.
Remote code execution in WatchGuard Fireware OS affects the epm (Endpoint Protection Manager) service tied to the deprecated Mobile Security feature, where a stack-based buffer overflow lets an unauthenticated remote attacker run arbitrary code on the appliance. The CVSS 4.0 base score is 9.3 (critical) with a network, no-privilege, no-interaction vector. No public exploit identified at time of analysis and it is not listed in CISA KEV, but as a perimeter firewall RCE the impact is severe for any deployment still running Mobile Security.
Remote code execution in WatchGuard Fireware OS is possible via a heap overflow (CWE-122) in the iked (IKE/IPsec key management) process, letting a remote unauthenticated attacker run arbitrary code by sending specially crafted network traffic to an affected Firebox firewall. The vendor-assigned CVSS 4.0 base score is 9.3 (critical), reflecting network-reachable, no-privilege, no-interaction exploitation with full confidentiality, integrity, and availability impact. There is no public exploit identified at time of analysis and the CVE is not in CISA KEV, but the pre-authentication nature and the perimeter role of the affected device make this a high-priority patching item.
Remote unauthenticated attackers can crash the VPN processing service on WatchGuard Fireware OS by sending specially crafted IKE network traffic that triggers a double-free memory corruption in the iked daemon. The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:N/VA:H) confirms zero prerequisites for exploitation against any internet-exposed WatchGuard appliance with IPsec VPN active. No public exploit code has been identified at time of analysis, and the vulnerability does not appear in the CISA KEV catalog.
Out-of-bounds read in the WatchGuard Fireware OS iked (IKE daemon) process allows remote unauthenticated attackers to disrupt VPN operations by sending specially crafted network packets. The flaw resides in VPN processing logic and can crash or destabilize the IKE service, cutting off IPsec/IKEv2 tunnels for connected clients and sites. No public exploit has been identified at time of analysis and CISA KEV listing is not confirmed; however, the unauthenticated network attack vector and CVSS 4.0 score of 8.7 place this in the priority triage tier for organizations relying on WatchGuard Firebox VPN connectivity.
Remote code execution in WatchGuard Fireware OS affects the iked (IKE/IPsec VPN key-exchange) daemon, where a stack-based buffer overflow lets a remote, unauthenticated attacker run arbitrary code by sending specially crafted network traffic. Because iked terminates VPN negotiations at the network edge, any Firebox appliance exposing IKE/IPsec is reachable pre-authentication. No public exploit has been identified at time of analysis and the CVE is not listed in CISA KEV, but the pre-auth RCE profile on a perimeter security device makes this a top-priority patch.
Buffer overflow in the WatchGuard Fireware OS Management Web UI allows an authenticated administrator with network access to trigger a denial-of-service condition or potentially execute arbitrary code by submitting specially crafted traffic to the management interface. The root cause is CWE-787 (out-of-bounds write) in the web-based management component, and the CVSS 4.0 vector confirms network reachability with high-privilege authentication as prerequisites. No public exploit code or active exploitation has been identified at time of analysis, though the RCE potential on a network perimeter device elevates the severity beyond what the privilege requirement alone might suggest.
Authenticated command execution in WatchGuard Fireware OS lets a privileged administrator escalate a specially crafted CLI command into arbitrary code execution via an out-of-bounds write (CWE-787). The flaw affects a very broad version span (Fireware OS 11.0 through 11.12.4_Update1, 12.0 through 12.12, and 2025.1 through 2026.2), placing most currently and historically deployed WatchGuard Firebox appliances in scope. No public exploit identified at time of analysis and the issue is not listed in CISA KEV; the CVSS 4.0 score of 8.6 reflects full confidentiality/integrity/availability impact once the required privileged access is obtained.
Remote code execution in WatchGuard Fireware OS (the operating system powering Firebox network security appliances) allows an authenticated privileged administrator to run arbitrary code on the firewall by sending specially crafted requests to the Management Web UI, which trigger an out-of-bounds write in the networkd process. The flaw spans a wide version range (11.8 through 11.12.4_Update1, 12.0 through 12.12, and 2025.1 through 2026.2) and carries a CVSS 4.0 base score of 8.6 (High). It was reported by WatchGuard's own PSIRT; there is no public exploit identified at time of analysis and it is not listed in CISA KEV.
Arbitrary file write in the WatchGuard Fireware OS Management Web UI lets a privileged, authenticated administrator escape the intended directory and write files anywhere on a Firebox appliance's filesystem, per CVSS 4.0 (AV:N/PR:H). This affects Fireware OS across the 11.x, 12.x, and 2025.1-2026.2 branches and can be leveraged to tamper with configuration or system binaries, potentially leading to code execution or device compromise. There is no public exploit identified at time of analysis and it is not listed in CISA KEV.
Local privilege escalation in WatchGuard Mobile VPN with SSL client for Windows (versions up to and including 2026.2) lets an authenticated local attacker elevate from a low-privileged account to NT AUTHORITY\SYSTEM on any machine where the client is installed. The flaw is rooted in insecure permission assignment (CWE-732), and there is no public exploit identified at time of analysis, though the vendor-reported nature and full high-impact CVSS (7.3, CVSS 4.0) make it a meaningful endpoint-hardening concern.
Remote code execution in WatchGuard Fireware OS (the firmware powering WatchGuard Firebox firewall appliances) allows an unauthenticated attacker positioned on the same local/adjacent network segment to trigger an out-of-bounds write and execute arbitrary code. The flaw spans a wide firmware range - 11.0 through 11.12.4_Update1, 12.0 through 12.12, and 2025.1 through 2026.2 - and was self-reported by WatchGuard via its PSIRT. There is no public exploit identified at time of analysis and it is not listed in CISA KEV, but the network-adjacent, unauthenticated, high-impact profile makes it a serious perimeter-device concern.
Denial-of-service in WatchGuard Fireware OS lets a remote, unauthenticated attacker crash the IKEv2 VPN service by sending specially crafted IKEv2 messages that trigger a null pointer dereference (CWE-476). The flaw affects appliances running Mobile User VPN with IKEv2 or Branch Office VPN over IKEv2 with a dynamic gateway peer, spanning Fireware OS 11.10.2 through 2026.2. No public exploit identified at time of analysis; the CVSS 4.0 score of 8.7 reflects high availability impact with no confidentiality or integrity loss.
Remote code execution in WatchGuard Fireware OS affects Fireboxes running a Mobile User VPN with IKEv2 that authenticates against an external LDAP server. A race condition in the IKEv2 LDAP authentication path can be driven into a use-after-free (CWE-416) inside the iked daemon, letting a remote unauthenticated attacker execute arbitrary code in the context of that process. No public exploit identified at time of analysis, and the CVSS 4.0 base score of 9.2 is tempered by high attack complexity and a probabilistic attack requirement (AC:H/AT:P), reflecting the difficulty of reliably winning the race.
Firmware signature validation bypass in WatchGuard Fireware OS lets an authenticated administrator upload a tampered firmware image through the backup/restore feature and have it installed despite failing integrity checks. Affecting Fireware OS branches 11.0 through 11.12.4_Update1, 12.0 through 12.12, and 2025.1 through 2025.6.2, the flaw (CWE-347) enables persistent malicious code on the appliance. No public exploit identified at time of analysis and it is not listed in CISA KEV, but the high integrity/confidentiality/availability impact and the appliance's privileged network position make it significant.
Authenticated arbitrary code execution in WatchGuard Fireware OS (12.1-12.12 and 2025.1-2026.2) arises from an out-of-bounds write in the wgagent process, reachable when a privileged user sends specially crafted requests to the Management Web UI. A high-privilege attacker (or one who has compromised admin credentials) can corrupt memory to run code on the firewall appliance, undermining the security gateway itself. No public exploit has been identified at time of analysis, and the issue is not listed in CISA KEV.
Arbitrary code execution in WatchGuard Fireware OS (the firmware powering Firebox network security appliances) arises from an out-of-bounds write in the ikestubd process, reachable through the Management Web UI. An authenticated user holding privileged (administrative) access can send specially crafted requests to corrupt memory and execute code on the appliance. No public exploit identified at time of analysis and the issue is not listed in CISA KEV; risk is bounded by the requirement for existing privileged access.
Remote code execution in WatchGuard Fireware OS versions 12.6.1 through 12.11.8 and 2025.1 through 2026.1.2 allows privileged authenticated attackers to execute arbitrary code with elevated system privileges via path traversal in the Web UI. The vulnerability requires high-level administrative access (CVSS PR:H) but presents a direct RCE path once authenticated. WatchGuard self-reported this issue with an official advisory available. EPSS and KEV data not provided; no public exploit identified at time of analysis.
Cross-Site Request Forgery (CSRF) in WatchGuard Fireware OS WebUI allows remote attackers to trigger a denial-of-service condition against the Web UI by tricking an authenticated administrator into visiting a malicious webpage. This affects Fireware OS versions 11.8 through 11.12.4+541730, 12.0 through 12.11.8, and 2025.1 through 2026.1.2. The CVSS v4.0 score of 7.1 reflects high availability impact (VA:H) with no user authentication required (PR:N) but requiring user interaction (UI:P). No public exploit identified at time of analysis, though the attack complexity is low and the CSRF nature makes weaponization straightforward for adversaries targeting firewall administrators.
Insecure deserialization in WatchGuard Fireware OS enables local code execution as the portald user when combined with a filesystem write primitive. Affects Fireware OS versions 12.1 through 12.11.8 and 2025.1 through 2026.1.2 on platforms supporting Access Portal (excludes T-15/T-35 models). CVSS 8.4 severity reflects high impact but requires prior high-privilege local access and an existing write vulnerability to exploit. No public exploit identified at time of analysis, with EPSS data unavailable for risk probability assessment.
Authorization bypass in the WatchGuard Fireware OS Access Portal reverse proxy lets an authenticated, low-privileged portal user reach back-end web applications they are not entitled to by sending a specially crafted request for a resource they are authorized to access. Exploitation requires valid Access Portal credentials, the SSL clientless portal to be enabled and reachable, and a specific crafted-request condition (CVSS 4.0 AT:P), so this is a genuine but bounded access-control flaw rather than a pre-auth compromise path. Impact is primarily confidentiality: unauthorized read of other portal-published web applications, with limited integrity effects and no availability impact. No public exploit code or confirmed active exploitation was identified at time of analysis.
Heap-based buffer overflow in WatchGuard Fireware OS's iked process allows an authenticated administrator to crash the IKE daemon by saving a specially crafted configuration, resulting in denial of service and disruption of IPsec VPN services. The CVSS 4.0 score of 6.9 with PR:H reflects the high-privilege requirement, meaning exploitation is gated behind valid administrator credentials. No active exploitation has been identified (not in CISA KEV) and no public exploit code is known at time of analysis.
WatchGuard Fireware OS deployed in FireCluster high-availability configurations falls back to a static, hard-coded encryption key to protect saved Access Portal credentials under unspecified exception circumstances, meaning any actor who can retrieve those encrypted credential stores can decrypt them offline using the known firmware key. Affected builds span Fireware OS 12.1 through 12.12 and 2025.1 through 2026.2; standalone Fireboxes and devices without Access Portal support are explicitly out of scope. No public exploit has been identified at time of analysis and this vulnerability is not listed in the CISA KEV catalog, but CWE-798 class flaws become broadly exploitable once the static key is extracted from firmware through reverse engineering.
Stored XSS in WatchGuard Fireware OS's SIP Proxy module enables a high-privileged attacker to plant persistent malicious JavaScript that executes in the browsers of other privileged users who access affected management interface pages. Covering Fireware OS versions 12.0 through 12.12, 12.5 through 12.5.18, and 2025.1 through 2026.2, this CVE is explicitly disclosed as an additional, previously unmitigated attack path for CVE-2025-6947 - meaning organizations that applied the prior patch may incorrectly believe their exposure is closed. No public exploit has been identified at time of analysis and this vulnerability is not listed in the CISA KEV catalog.
Stored XSS in WatchGuard Fireware OS's spamBlocker module enables a high-privileged attacker to persist malicious JavaScript that executes in the browsers of other authenticated users viewing the affected management interface. This vulnerability is explicitly identified as an additional, unmitigated attack path bypassing the remediation applied for CVE-2025-1071, indicating the original fix was incomplete. The CVSS 4.0 vector scores this at 4.8 (Medium), with no confirmed active exploitation and no public exploit identified at time of analysis.
Stored cross-site scripting in WatchGuard Fireware OS's Autotask Technology Integration module allows a high-privileged attacker to inject persistent malicious scripts that execute in the browsers of other users who view the affected management interface pages. Affecting Fireware OS versions 12.4 through 12.12, 12.5 through 12.5.18, and 2025.1 through 2026.2, this flaw is explicitly described as an additional unmitigated attack path alongside the related CVE-2025-13938, suggesting prior remediation efforts were incomplete. No public exploit code or confirmed active exploitation has been identified at time of analysis.
Stored cross-site scripting in WatchGuard Fireware OS via the ConnectWise Technology Integration module allows a highly privileged attacker to inject persistent malicious scripts into the web management interface, which then execute in the browsers of other authenticated users who view the affected pages. This vulnerability is explicitly described as an additional, previously unmitigated attack path for CVE-2025-13937, indicating that the prior remediation was incomplete and a bypass exists. No public exploit code or CISA KEV listing has been identified at time of analysis, but the relationship to an earlier CVE suggests at least some organizational knowledge of the attack surface.
Stored XSS in WatchGuard Fireware OS's Tigerpaw Technology Integration module allows a high-privileged attacker to persist malicious scripts within the management interface, which then execute in the browsers of other authenticated users who visit the affected pages. Critically, this CVE is identified as an additional unmitigated attack path for CVE-2025-13936, indicating an incomplete remediation of a prior related XSS flaw in the same integration module. Affected versions span the 12.4, 12.5, and 2025.x/2026.x release trains; no public exploit or CISA KEV listing has been identified at time of analysis.
Denial-of-service in WatchGuard Fireware OS Management Web UI allows an authenticated administrator to crash the management service by submitting crafted input to the put_data endpoint, which performs unsafe deserialization of attacker-controlled data (CWE-502). The CVSS 4.0 vector (PR:H, VA:H) confirms that exploitation is restricted to administrator-level accounts and results in availability loss only - no confidentiality or integrity impact. No public exploit code and no CISA KEV listing have been identified at time of analysis, placing this firmly in the insider-threat and compromised-credential risk category.