Watchguard
CVE-2025-9242
CRITICAL
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A06:2021 - Vulnerable and Outdated Components
ASVS 5.0
V15 - Secure Coding and Architecture Bounds checking, write limits
MITRE ATT&CK
2 techniques across 2 tactics: Execution, Privilege Escalation The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | Critical risk (CVSS 9.3, EPSS 69%). Firewalls using IKEv2 VPN are directly exposed to the internet. Unauthenticated RCE on the firewall provides full network access. |
| Exploit ScenarioDerived | An attacker sends crafted IKEv2 packets to a WatchGuard firewall's VPN port. The OOB write achieves code execution, providing full control of the firewall and access to all protected network traffic. |
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Alert meAnalysisAIv1 – Mar 28, 2026
WatchGuard Fireware OS contains an out-of-bounds write in IKEv2 VPN handling enabling unauthenticated remote code execution on WatchGuard firewalls.
Earlier versions of this analysis (1)
An OOB write in WatchGuard Fireware OS's IKEv2 implementation allows unauthenticated remote code execution on WatchGuard firewalls configured with Mobile User VPN or Branch Office VPN.
RemediationAI
Update Fireware OS. Disable IKEv2 VPN if not required. Monitor for exploitation indicators.
Affects your stack
Find out whether the stacks and servers you run are on an affected version.
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
The CWE-787 OOB write in IKEv2 processing allows crafted VPN negotiation packets to corrupt memory and achieve code execution on the firewall.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Primary rating from Vendor (5d1c2695-1a31-4499-88ae-e847036fd7e3) · only source for this CVE.
CVSS VectorVendor: 5d1c2695-1a31-4499-88ae-e847036fd7e3
Lifecycle Timeline
3DescriptionCVE.org
An Out-of-bounds Write vulnerability in WatchGuard Fireware OS may allow a remote unauthenticated attacker to execute arbitrary code. This vulnerability affects both the Mobile User VPN with IKEv2 and the Branch Office VPN using IKEv2 when configured with a dynamic gateway peer.This vulnerability affects Fireware OS 11.10.2 up to and including 11.12.4_Update1, 12.0 up to and including 12.11.3 and 2025.1.
Executive ViewAI
CVE-2025-9242 presents critical security risk, a out-of-bounds write vulnerability rated CVSS 9.3. Exploitation could allow attackers to corrupt memory, crash the application, or potentially execute arbitrary code. This vulnerability is actively exploited in the wild (KEV-listed) and requires immediate remediation. Immediate patching is required per CISA KEV mandate.
Apply vendor patch. If immediate patching is not feasible: (1) Enable ASLR and DEP where available; (2) Implement network segmentation; (3) Monitor for exploitation indicators.
Threat Intelligence Overview
NVD
CVE.org
CISA KEV
EPSS
GitHub
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.
Memory corruption occurs when a program writes data beyond the boundaries of allocated memory regions or accesses memory in unintended ways, violating the integrity of the process's address space.
Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.
Affected Products (CPE)CVE.org
More in Watchguard
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Buffer overflow in WGagent in WatchGuard WSM and Fireware before 11.8 allows remote attackers to execute arbitrary code
Remote code execution in WatchGuard Fireware OS arises from an out-of-bounds write in the iked (IKE) daemon, letting an
SQL injection vulnerability in Watchguard XCS 9.2 and 10.0 before build 150522 allows remote attackers to execute arbitr
On WatchGuard Firebox and XTM appliances, an unauthenticated user can execute arbitrary code, aka FBX-22786. Rated criti
An issue was discovered on WatchGuard AP100, AP102, and AP200 devices with firmware before 1.2.9.15. Rated critical seve
Multiple cross-site request forgery (CSRF) vulnerabilities in Hexis HawkEye G 3.0.1.4912 allow remote attackers to hijac
An issue was discovered on WatchGuard AP100, AP102, and AP200 devices with firmware before 1.2.9.15, and AP300 devices w
WatchGuard RapidStream appliances allow local users to gain privileges and execute arbitrary commands via a crafted ifco
Panda Endpoint Administration Agent before 7.50.00, as used in Panda Security for Business products for Windows, uses a
Panda Security URL Filtering before 4.3.1.9 uses a weak ACL for the "Panda Security URL Filtering" directory and install
An issue was discovered on WatchGuard AP100, AP102, and AP200 devices with firmware before 1.2.9.15. Rated high severity
Exploit-DB