CVE-2022-26318

CRITICAL9.8

CISA KEV

Published 2022-03-04 · Updated 2026-06-17 · Source cve@mitre.org

Summary

CVE-2022-26318 is a critical-severity (CVSS 9.8) vulnerability in WatchGuard Firebox and XTM Appliances. CISA added it to the Known Exploited Vulnerabilities catalog on March 25, 2022, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by April 15, 2022. CISA does not currently list it as used in ransomware campaigns. WatchGuard has 4 vulnerabilities in the KEV catalog, 1 of them linked to ransomware.

All 4 known-exploited WatchGuard vulnerabilities →

Description

On WatchGuard Firebox and XTM appliances, an unauthenticated user can execute arbitrary code, aka FBX-22786. This vulnerability impacts Fireware OS before 12.7.2_U2, 12.x before 12.1.3_U8, and 12.2.x through 12.5.x before 12.5.9_U2.

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

CISA Known-Exploited Vulnerability

Product: WatchGuard — Firebox and XTM Appliances

Name: WatchGuard Firebox and XTM Appliances Arbitrary Code Execution

Date added: 2022-03-25 · Due: 2022-04-15

Required action: Apply updates per vendor instructions.

References

View on NVD

More exploited WatchGuard vulnerabilities

Most recently added to CISA KEV

CVE-2025-14733
RANSOMWARE
Firebox — WatchGuard Firebox Out of Bounds Write Vulnerability
added 2025-12-19
CVE-2025-9242
Firebox — WatchGuard Firebox Out-of-Bounds Write Vulnerability
added 2025-11-12
CVE-2022-23176
Firebox and XTM — WatchGuard Firebox and XTM Privilege Escalation Vulnerability
added 2022-04-11

View all →

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