CVE-2026-86131CWE-295CWE-829CWE-94code-injection

CVE-2026-86131

Critical · published September 30, 2026

CVSS v3.1
9.8
EPSS
0%
Percentile
35.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
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
EPSS
0.00420 · 35.3th percentile
Weaknesses
CWE-295 · Improper Certificate Validation; CWE-829 · Inclusion of Functionality from Untrusted Control Sphere; CWE-94 · Improper Control of Generation of Code ('Code Injection')
Published
2026-09-30T04:16Z
Affected products (4)
ProductVersionsFixed in
watchguard/fireware≥ 12.0, < 12.5.2112.5.21
watchguard/fireware≥ 12.12, < 12.12.312.12.3
watchguard/fireware≥ 2025.0, < 2026.2.32026.2.3
watchguard/fireware≥ 2026.3, < 2026.3.22026.3.2
References (1)
https://psirt.watchguard.com/CVE-2026-86131 · 5d1c2695-1a31-4499-88ae-e847036fd7e3
EPSS history
Timeline
  • 01 OCT 03:49Z
    EPSS moved — → 0%
    epss
  • 29 SEP 23:05Z
    Fireware OS Code Injection in BOVPN Over TLS Client Allows Remote Code Execution
    cvelistv5