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CVE-2022-26318

9.8, critical Known exploited

WatchGuard Firebox and XTM Appliances Arbitrary Code Execution

NVD (opens in a new tab) CVE.org (opens in a new tab) CISA KEV catalogue (opens in a new tab)
CVSS
9.8, critical critical CVSS v3.1
EPSS, next 30 days
78% higher than 99.5% of scored CVEs
Exploitation
Confirmed in the wild
Published
4 Mar 20224 years ago

Known exploited

CISA added this to the Known Exploited Vulnerabilities Catalog on 25 Mar 2022. US federal agencies had to remediate by 15 Apr 2022, a deadline that has passed.

Required action. Apply updates per vendor instructions.

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.

Details

Vendor
WatchGuard
Product
Fireware
Weakness
n/a
Status
Analyzed
Updated
17 Jun 2026
Assigner
cve@mitre.org

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

References 2

Advisories 1

Other references 1

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other WatchGuard CVEs

Every WatchGuard CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2025-14733 WatchGuard Firebox Out of Bounds Write Vulnerability KEV EPSS 27% 9.8, critical
  • CVE-2025-9242 WatchGuard Firebox Out-of-Bounds Write Vulnerability KEV EPSS 92% 9.8, critical
  • CVE-2022-23176 WatchGuard Firebox and XTM Privilege Escalation Vulnerability KEV EPSS 11% 8.8, high
  • CVE-2026-86131 WatchGuard Fireware OS Code Injection Vulnerability EPSS 0.4% 9.8, critical
  • CVE-2026-13046 WatchGuard Fireware OS Deserialization of Untrusted Data Vulnerability EPSS 0.4% 7.2, high
  • CVE-2026-18145 WatchGuard Fireware OS Stack-based Buffer Overflow Vulnerability EPSS 0.4% 7.2, high
  • CVE-2026-86104 WatchGuard Fireware OS Uncontrolled Resource Consumption Vulnerability EPSS 0.4% 7.5, high
  • CVE-2026-86105 WatchGuard Fireware OS Path Traversal Vulnerability EPSS 0.3% 7.1, high

Beyond this page

Is CVE-2022-26318 in your network?

This page tells you how dangerous CVE-2022-26318 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

CVE-2022-26318 is in the CISA catalogue of exploited vulnerabilities: attackers are already exploiting it.

  • EXYS7600 OCELOT

    Find it before attackers do

    Ocelot scans your network on a schedule and reports every vulnerability it finds by its CVE identifier, with its CVSS score and how many of your hosts are affected. A finding like CVE-2022-26318 comes with the devices to patch.

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  • EXYS7950 KONDRA

    Detect it if it's exploited

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

    Learn more about EXYS7950 KONDRA
Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 16 Oct 2026, not the live upstream state.