CVE-2026-86131Fireware OS Code Injection in BOVPN Over TLS Client Allows Remote Code Execution

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.

9.2 CRITICALEPSS 0.46%Not in KEVNVD: Analyzed

Last updated: 2026-10-06 20:39 UTC

OverviewCVSS details

9.2CRITICALCVSS 4.0

Score source: WatchGuard (CNA)
NVD status: Analyzed
Published: Sep 30, 2026
Assigner: WatchGuard

Affected

Fireware OS (WatchGuard)

Versions: 2026.3 before 2026.3.2 · 2025.0 before 2026.2.3
Fixed in: 2026.3.2, 2026.2.3, 12.12.3

+1 more product →

Exploitation

Public exploit: None listed
CISA KEV: Not listed
KEV due date: —
SSVC: Exploitation none · Automatable yes · Impact total

EPSS · FIRST, scored Nov 7

0.46%chance of exploitation in 30 days

Higher than 40.80% of CVEs

CVSS 4.0 · WatchGuard (CNA)

9.2Critical

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

Attack vector: Network
Attack complexity: Low
Attack requirements: Present
Privileges required: None
User interaction: None
Confidentiality impact: High
Integrity impact: High
Availability impact: High
Confidentiality (other systems): None
Integrity (other systems): None
Availability (other systems): None

CVSS 3.1 · NVD

9.8Critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

NVD status: Analyzed

Overview Affected Products References

NVD CVE.org

Overview

Severity

Score	Severity	Version	Vector String
9.2	CRITICAL	4.0WatchGuard (CNA)	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
9.8	CRITICAL	3.1NVD	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CVE ID: CVE-2026-86131
Status: Analyzed
Assigner (CNA): WatchGuard
Published: Sep 30, 2026
Last modified: 2026-10-06 20:39 UTC
Weaknesses: CWE-295
CWE-829
CWE-94

Sources

Refreshed hourly from the sources above. Last fetched 2026-11-08 08:34 UTC.