CVE-2026-86131
Critical
9.8 CVSS v3.1
CVSS v4.0: 9.2
- Published
- Sep 30, 2026
- Updated
- Oct 6, 2026
- Vendor
- Watchguard
- Affected versions
- See affected products
- Weakness
- CWE-94, CWE-295, CWE-829
Summary
A code injection vulnerability in WatchGuard Fireware OS’s BOVPN Over TLS client configuration handling allows an attacker who controls the remote VPN server to execute arbitrary commands as root on the connecting Firebox.
Severity
Critical (9.8)CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0 (9.2)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/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
Affected products
- Watchguard Fireware >= 12.0, < 12.5.21
- Watchguard Fireware >= 12.12, < 12.12.3
- Watchguard Fireware >= 2025.0, < 2026.2.3
- Watchguard Fireware >= 2026.3, < 2026.3.2
Exploitation status
Unknown
Technical details
Technical analysis has not been written for this record yet.
Mitigation & remediation
Follow the vendor advisory linked below for patches and workarounds.