ZDI-26-632: WatchGuard FireWare OS epm connect Stack-based Buffer Overflow Remote Code Execution Vulnerability
ZDI disclosed a CVSS 8.8 unauthenticated stack-based buffer overflow in WatchGuard FireWare OS epm connect enabling network-adjacent remote code execution.
ZDI published advisory ZDI-26-632 for a stack-based buffer overflow in the epm connect component of WatchGuard FireWare OS. Network-adjacent attackers can execute arbitrary code without authentication. ZDI assigned CVSS 8.8 and the issue is tracked as CVE-2026-13086.
- Remote code execution in WatchGuard FireWare OS
- Pre-authentication, network-adjacent attack vector
- ZDI rated the issue CVSS 8.8
- Tracked as CVE-2026-13086
- CVEs
- CVE-2026-13086
- Products
- FireWare OS
- Organizations
- Zero Day Initiative
Vulnerabilities mentioned
All| CVE | Vulnerability | CVSS | EPSS | Signals | Published |
|---|---|---|---|---|---|
| CVE-2026-13086 | Unauthenticated Stack Buffer Overflow RCE in WatchGuard Fireware OS epm Service | 9.3 | <1% |
From the original article
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of WatchGuard FireWare OS. Authentication is not required to exploit this vulnerability. The ZDI has assigned a CVSS rating of 8.
zerodayinitiative.com
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