CVE-2026-3342— WatchGuard Firebox Out of Bounds Write Vulnerability
Quick assessment
Affected
WatchGuard Fireware OS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
WatchGuard Fireware OS是美国WatchGuard公司的一个在 Firebox 上运行的软件。 WatchGuard Fireware OS 11.9至11.12.4_Update1版本、12.0至12.11.7版本和2025.1至2026.1.1版本存在安全漏洞，该漏洞源于越界写入，可能导致经过身份验证的特权管理员通过暴露的管理界面以root权限执行任意代码。
Possible ATT&CK Techniques 2 AI
T1190 · Exploit Public-Facing Application T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2026-3342
Vulnerability Information
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Vulnerability Title
WatchGuard Firebox Out of Bounds Write Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Vulnerability Title
WatchGuard Fireware OS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WatchGuard Fireware OS是美国WatchGuard公司的一个在 Firebox 上运行的软件。 WatchGuard Fireware OS 11.9至11.12.4_Update1版本、12.0至12.11.7版本和2025.1至2026.1.1版本存在安全漏洞，该漏洞源于越界写入，可能导致经过身份验证的特权管理员通过暴露的管理界面以root权限执行任意代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| WatchGuard | Fireware OS | 11.9 ~ 11.12.4+541730 | - |
|
II. Public POCs for CVE-2026-3342
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-3342 (1)
Same Patch Batch · WatchGuard · 2026-03-03 · 3 CVEs total
| CVE-2026-3344 | 6.9 MEDIUM | WatchGuard Firebox System Integrity Check Bypass |
| CVE-2026-3343 | 5.1 MEDIUM | WatchGuard Firebox Reflected Cross-Site-Scripting (XSS) Vulnerability in Fireware Web UI |
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V. Comments for CVE-2026-3342
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