CVE-2026-86131 WatchGuard Fireware OS - Command Injection

WatchGuard Fireware OS contains a command injection caused by improper handling of BOVPN Over TLS client configuration, letting attackers controlling the remote VPN server execute arbitrary commands as root, exploit requires attacker to control remote VPN server.

CVSS base score 9.8 /10
Critical
CISA KEV
Not listed
Public exploit
None known
EPSS
0.42% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Command Injection
Impact
Remote Code Execution
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
30 September 2026
Updated
15 October 2026
Weakness
CWE-94

Vendor fix

Update to the latest Fireware OS version.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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