Critical [CVE-2026-86131] 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
This critical-severity WatchGuard advisory covers CVE-2026-86131 affecting Fireware OS.
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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.
- Fireware OS 2026.3 before 2026.3.2
- Fireware OS 2025.0 before 2026.2.3
- Fireware OS 12.0 before 12.12.3
- Fireware OS 12.0 before 12.5.21
Official advisory · high-confidence parse· fetched 9 hours ago·verify at source
- 2026.3.2
- 2026.2.3
- 12.12.3
- 12.5.21
Official advisory · high-confidence parse· fetched 9 hours ago·verify at source
Mitigation
Upgrade to a fixed release: 2026.3.2, 2026.2.3, 12.12.3, 12.5.21. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 9 hours ago·verify at source
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