Skip to main content

Fireware OS CVE-2026-13053

| EUVDEUVD-2026-41463 HIGH
Out-of-bounds Write (CWE-787)
2026-07-02 WatchGuard GHSA-mh9h-xjv7-9f27
Memory Corruption Watchguard Buffer Overflow RCE Fireware Os
8.6
CVSS 4.0 · Vendor: WatchGuard
Share

Severity by source

Vendor (WatchGuard) PRIMARY
8.6 HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
7.2 HIGH

Privileged admin CLI access required (PR:H) over the network management interface (AV:N) with low complexity and no user interaction; code execution yields full C/I/A impact confined to the appliance (S:U).

3.1 AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (WatchGuard).

CVSS VectorVendor: WatchGuard

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
X

Lifecycle Timeline

1
Analysis Generated
Jul 02, 2026 - 23:54 vuln.today

DescriptionCVE.org

An Out-of-bounds Write vulnerability in WatchGuard Fireware OS's CLI could allow an authenticated privileged user to execute arbitrary code via a specially crafted CLI command.

This vulnerability affects Fireware OS 11.0 up to and including 11.12.4_Update1, 12.0 up to and including 12.12 and 2025.1 up to and including 2026.2.

AnalysisAI

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. …

Unlock full vulnerability intelligence

  • Risk assessment & exploitation conditions
  • Attack chain visualization
  • Remediation with exact patch versions
  • Threat intelligence from 22 sources
  • Personal watchlist & email alerts
Continue with Google Continue with GitHub

Free forever · No credit card required

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Obtain privileged Firebox admin credentials
Delivery
Reach Fireware OS CLI over network
Exploit
Submit specially crafted CLI command
Execution
Trigger out-of-bounds write in parser
Persist
Hijack control flow via memory corruption
Impact
Execute arbitrary code on appliance
Sign in to reveal

Vulnerability AssessmentAI

Exploitation Exploitation requires an authenticated, privileged (administrator-level) user with access to the Fireware OS CLI (PR:H) who submits a specially crafted CLI command to the command interface - this privileged CLI access is the concrete precondition. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The vendor CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H) shows the dominant limiting factor is PR:H - exploitation requires an already-authenticated, privileged administrator, which narrows the realistic threat to insiders, credential-theft or session-hijack chains, or a restricted-CLI breakout. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker who has obtained privileged WatchGuard Firebox admin credentials - for example via phishing, reused passwords, or a hijacked management session - logs into the Fireware OS CLI over the network and issues a specially crafted command that triggers the out-of-bounds write, corrupting memory to execute attacker-controlled code on the appliance. No public exploit is currently identified, and the low attack complexity means that once privileged CLI access is held, no victim interaction or special timing is needed to attempt exploitation.
Remediation Patch available per vendor advisory: consult WatchGuard PSIRT advisory WGSA-2026-00030 (https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00030) for the fixed Fireware OS build and upgrade to a release beyond the affected 2026.2 / 12.12 / 11.12.4_Update1 ceilings for your branch - an exact fix version is not stated in the available data, so do not assume a version number. … Detailed patch versions, workarounds, and compensating controls in full report.
Sign in to read full assessment

Recommended ActionAI

Within 24 hours: Audit all WatchGuard Fireware deployments to identify affected versions; restrict CLI administrative access to dedicated jump hosts or hardened networks only; enable comprehensive CLI command logging. …

Sign in for detailed remediation steps and compensating controls.

Threat intelligence, references, and detailed analysis are available after sign-in.

More in Watchguard

View all
CVE-2015-5453 MEDIUM POC
6.5 Jul 08

Watchguard XCS 9.2 and 10.0 before build 150522 allow remote authenticated users to execute arbitrary commands via shell
CVE-2015-5452 HIGH POC
7.5 Jul 08

SQL injection vulnerability in Watchguard XCS 9.2 and 10.0 before build 150522 allows remote attackers to execute arbitr
CVE-2022-26318 CRITICAL POC
9.8 Mar 04

On WatchGuard Firebox and XTM appliances, an unauthenticated user can execute arbitrary code, aka FBX-22786. Rated criti
CVE-2018-10575 CRITICAL POC
9.8 Apr 30

An issue was discovered on WatchGuard AP100, AP102, and AP200 devices with firmware before 1.2.9.15. Rated critical seve
CVE-2018-10577 HIGH POC
8.8 May 02

An issue was discovered on WatchGuard AP100, AP102, and AP200 devices with firmware before 1.2.9.15, and AP300 devices w
CVE-2016-7089 HIGH POC
7.8 Aug 24

WatchGuard RapidStream appliances allow local users to gain privileges and execute arbitrary commands via a crafted ifco
CVE-2018-10576 HIGH POC
7.8 Apr 30

An issue was discovered on WatchGuard AP100, AP102, and AP200 devices with firmware before 1.2.9.15. Rated high severity
CVE-2017-14616 HIGH POC
7.5 Sep 20

An FBX-5312 issue was discovered in WatchGuard Fireware before 12.0. Rated high severity (CVSS 7.5), this vulnerability

CVE-2017-8056 MEDIUM POC
5.3 Apr 22

WatchGuard Fireware v11.12.1 and earlier mishandles requests referring to an XML External Entity (XXE), in the XML-RPC a
CVE-2022-31790 HIGH POC
7.5 Sep 06

WatchGuard Firebox and XTM appliances allow an unauthenticated remote attacker to retrieve sensitive authentication serv
CVE-2020-10532 HIGH POC
7.5 Mar 12

The AD Helper component in WatchGuard Fireware before 5.8.5.10317 allows remote attackers to discover cleartext password
CVE-2017-14615 MEDIUM POC
6.1 Sep 20

An FBX-5313 issue was discovered in WatchGuard Fireware before 12.0. Rated medium severity (CVSS 6.1), this vulnerabilit

Same weakness CWE-787 – Out-of-bounds Write

View all
CVE-2015-3113 CRITICAL POC
9.8
CVE-2011-2462 CRITICAL POC
9.8
CVE-2012-1889 HIGH POC
8.8
CVE-2010-3333 HIGH POC
7.8
CVE-2014-1761 HIGH POC
7.8
CVE-2009-3129 HIGH POC
7.8
CVE-2021-1732 HIGH POC
7.8
CVE-2013-3346 CRITICAL POC
9.8

Same technique Memory Corruption

View all
CVE-2015-5119 CRITICAL POC
9.8
CVE-2015-3113 CRITICAL POC
9.8
CVE-2011-2462 CRITICAL POC
9.8
CVE-2011-0611 HIGH POC
8.8
CVE-2014-0322 HIGH POC
8.8
CVE-2012-1889 HIGH POC
8.8
CVE-2012-4792 HIGH POC
8.8
CVE-2010-3333 HIGH POC
7.8

Share

CVE-2026-13053 vulnerability details – vuln.today
Back

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy