WatchGuard Firebox Out of Bounds Write Vulnerability
Priority MEDIUM 49CWE-787Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.
Summary
An Out-of-bounds Write vulnerability in WatchGuard Fireware OS may allow an authenticated privileged administrator to execute arbitrary code with root permissions via an exposed management interface. This vulnerability affects Fireware OS 11.9 up to and including 11.12.4_Update1, 12.0 up to and including 12.11.7 and 2025.1 up to and including 2026.1.1.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.06431 93rd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| WatchGuard | Fireware OS | 11.9 – 11.12.4+541730; 12.0 – 12.11.7; 12.5 – 12.5.16; 2025.1 – 2026.1.1 | — | No fix listed | CNA |
- Fireware OS VendorWatchGuard Affected 11.9 – 11.12.4+541730; 12.0 – 12.11.7; 12.5 – 12.5.16; 2025.1 – 2026.1.1 Fixed in — No fix listed CNA
CPE configurations NVD · 41
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:watchguard:fireware:*:*:*:*:*:*:*:* | 12.5 to before 12.5.17 | Vulnerable | WatchGuard |
| cpe:2.3:h:watchguard:firebox_t15:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WatchGuard |
| cpe:2.3:h:watchguard:firebox_t35:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WatchGuard |
| cpe:2.3:o:watchguard:fireware:*:*:*:*:*:*:*:* | 2025.1 to before 2026.1.2 | Vulnerable | WatchGuard |
| cpe:2.3:h:watchguard:firebox_m295:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WatchGuard |
| cpe:2.3:h:watchguard:firebox_m395:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WatchGuard |
| cpe:2.3:h:watchguard:firebox_m495:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WatchGuard |
| cpe:2.3:h:watchguard:firebox_m595:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WatchGuard |
| cpe:2.3:h:watchguard:firebox_m695:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WatchGuard |
| cpe:2.3:h:watchguard:firebox_t115-w:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WatchGuard |
- cpe:2.3:o:watchguard:fireware:*:*:*:*:*:*:*:* Versions 12.5 to before 12.5.17 Vulnerable ·WatchGuard
- cpe:2.3:h:watchguard:firebox_t15:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WatchGuard
- cpe:2.3:h:watchguard:firebox_t35:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WatchGuard
- cpe:2.3:o:watchguard:fireware:*:*:*:*:*:*:*:* Versions 2025.1 to before 2026.1.2 Vulnerable ·WatchGuard
- cpe:2.3:h:watchguard:firebox_m295:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WatchGuard
- cpe:2.3:h:watchguard:firebox_m395:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WatchGuard
- cpe:2.3:h:watchguard:firebox_m495:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WatchGuard
- cpe:2.3:h:watchguard:firebox_m595:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WatchGuard
- cpe:2.3:h:watchguard:firebox_m695:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WatchGuard
- cpe:2.3:h:watchguard:firebox_t115-w:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WatchGuard
Show 31 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:h:watchguard:firebox_t125:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WatchGuard |
| cpe:2.3:h:watchguard:firebox_t125-w:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WatchGuard |
| cpe:2.3:h:watchguard:firebox_t145:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WatchGuard |
| cpe:2.3:h:watchguard:firebox_t145-w:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WatchGuard |
| cpe:2.3:h:watchguard:firebox_t185:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WatchGuard |
| cpe:2.3:o:watchguard:fireware:*:*:*:*:*:*:*:* | 11.9 to before 12.11.8 | Vulnerable | WatchGuard |
| cpe:2.3:h:watchguard:firebox_m270:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WatchGuard |
| cpe:2.3:h:watchguard:firebox_m290:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WatchGuard |
| cpe:2.3:h:watchguard:firebox_m370:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WatchGuard |
| cpe:2.3:h:watchguard:firebox_m390:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WatchGuard |
| cpe:2.3:h:watchguard:firebox_m440:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WatchGuard |
| cpe:2.3:h:watchguard:firebox_m4600:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WatchGuard |
| cpe:2.3:h:watchguard:firebox_m470:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WatchGuard |
| cpe:2.3:h:watchguard:firebox_m4800:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WatchGuard |
| cpe:2.3:h:watchguard:firebox_m5600:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WatchGuard |
| cpe:2.3:h:watchguard:firebox_m570:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WatchGuard |
| cpe:2.3:h:watchguard:firebox_m5800:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WatchGuard |
| cpe:2.3:h:watchguard:firebox_m590:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WatchGuard |
| cpe:2.3:h:watchguard:firebox_m670:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WatchGuard |
| cpe:2.3:h:watchguard:firebox_m690:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WatchGuard |
| cpe:2.3:h:watchguard:firebox_nv5:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WatchGuard |
| cpe:2.3:h:watchguard:firebox_t20:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WatchGuard |
| cpe:2.3:h:watchguard:firebox_t25:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WatchGuard |
| cpe:2.3:h:watchguard:firebox_t40:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WatchGuard |
| cpe:2.3:h:watchguard:firebox_t45:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WatchGuard |
| cpe:2.3:h:watchguard:firebox_t55:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WatchGuard |
| cpe:2.3:h:watchguard:firebox_t70:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WatchGuard |
| cpe:2.3:h:watchguard:firebox_t80:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WatchGuard |
| cpe:2.3:h:watchguard:firebox_t85:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WatchGuard |
| cpe:2.3:h:watchguard:fireboxcloud:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WatchGuard |
| cpe:2.3:h:watchguard:fireboxv:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WatchGuard |
- cpe:2.3:h:watchguard:firebox_t125:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WatchGuard
- cpe:2.3:h:watchguard:firebox_t125-w:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WatchGuard
- cpe:2.3:h:watchguard:firebox_t145:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WatchGuard
- cpe:2.3:h:watchguard:firebox_t145-w:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WatchGuard
- cpe:2.3:h:watchguard:firebox_t185:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WatchGuard
- cpe:2.3:o:watchguard:fireware:*:*:*:*:*:*:*:* Versions 11.9 to before 12.11.8 Vulnerable ·WatchGuard
- cpe:2.3:h:watchguard:firebox_m270:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WatchGuard
- cpe:2.3:h:watchguard:firebox_m290:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WatchGuard
- cpe:2.3:h:watchguard:firebox_m370:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WatchGuard
- cpe:2.3:h:watchguard:firebox_m390:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WatchGuard
- cpe:2.3:h:watchguard:firebox_m440:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WatchGuard
- cpe:2.3:h:watchguard:firebox_m4600:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WatchGuard
- cpe:2.3:h:watchguard:firebox_m470:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WatchGuard
- cpe:2.3:h:watchguard:firebox_m4800:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WatchGuard
- cpe:2.3:h:watchguard:firebox_m5600:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WatchGuard
- cpe:2.3:h:watchguard:firebox_m570:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WatchGuard
- cpe:2.3:h:watchguard:firebox_m5800:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WatchGuard
- cpe:2.3:h:watchguard:firebox_m590:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WatchGuard
- cpe:2.3:h:watchguard:firebox_m670:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WatchGuard
- cpe:2.3:h:watchguard:firebox_m690:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WatchGuard
- cpe:2.3:h:watchguard:firebox_nv5:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WatchGuard
- cpe:2.3:h:watchguard:firebox_t20:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WatchGuard
- cpe:2.3:h:watchguard:firebox_t25:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WatchGuard
- cpe:2.3:h:watchguard:firebox_t40:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WatchGuard
- cpe:2.3:h:watchguard:firebox_t45:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WatchGuard
- cpe:2.3:h:watchguard:firebox_t55:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WatchGuard
- cpe:2.3:h:watchguard:firebox_t70:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WatchGuard
- cpe:2.3:h:watchguard:firebox_t80:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WatchGuard
- cpe:2.3:h:watchguard:firebox_t85:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WatchGuard
- cpe:2.3:h:watchguard:fireboxcloud:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WatchGuard
- cpe:2.3:h:watchguard:fireboxv:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WatchGuard
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-3342
- 2026-10-03 Alias added: GHSA-mg78-5w4c-gp57
- 2026-10-25 EPSS moved to the 90th–95th percentile
References
More WatchGuard Fireware vulnerabilities
- TI-2022-09698 On WatchGuard Firebox and XTM appliances, an unauthenticated user can execute arbitrary… KEVCVSS 3.1CRITICAL 9.8
- TI-2025-13451 WatchGuard Firebox iked Out of Bounds Write Vulnerability KEVCVSS 4.0CRITICAL 9.3
- TI-2025-08474 WatchGuard Firebox iked Out of Bounds Write Vulnerability KEVCVSS 4.0CRITICAL 9.3
- TI-2022-07330 WatchGuard Firebox and XTM appliances allow a remote attacker with unprivileged… KEVCVSS 3.1HIGH 8.8
- TI-2013-05132 Buffer overflow in WGagent in WatchGuard WSM and Fireware before 11.8 allows remote… CVSS 2.0HIGH 9.3
- TI-2026-58925 Fireware OS Code Injection in BOVPN Over TLS Client Allows Remote Code Execution CVSS 4.0CRITICAL 9.2
Sources
- CVE-2026-3342 · CVE Program
- CVE-2026-3342 · NVD
- FIRST EPSS
- GHSA-mg78-5w4c-gp57 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences