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Vulnerabilities

Vulnerability · CVE-2022-26318

WatchGuard Firebox and XTM Appliances Arbitrary Code Execution

Published Mar 4, 2022 · catalog updated Jun 16, 2026 · WatchGuard Firebox and XTM Appliances

Patch now

CVE-2022-26318 is in the CISA known-exploited catalog, due Apr 15, 2022. Confirm WatchGuard Firebox and XTM Appliances against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Severity
Critical9.8
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
78.16%
Remediation
Remediation guidance
Affected products
cpe watchguard/fireware · vendor WatchGuard Firebox and XTM Appliances

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe watchguard/fireware12.1.3
  • vendor WatchGuard Firebox and XTM Appliancesversion unspecified

How to fix CVE-2022-26318

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2022-26318 is in the CISA known-exploited catalog, due Apr 15, 2022. Confirm WatchGuard Firebox and XTM Appliances against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with 12.1.3. Apply updates per vendor instructions.

What should an analyst verify?

CWE-122: Heap-based Buffer Overflow. EPSS 78.16%. The CISA KEV listing is the exploitation evidence. A public exploit reference is linked in Sources. That is not the same as confirmed exploitation. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 4, 2022 · Catalog

    Detected

    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.

  2. Mar 25, 2022 · CISA KEV

    Known exploited

    Apply updates per vendor instructions.

  3. Apr 15, 2022 · CISA KEV

    Remediation due

    Apply updates per vendor instructions.

  4. Jun 16, 2026 · Catalog

    Updated

    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.

Sources

  • CISA KEVConfirmed exploitationCVE-2022-26318

    On WatchGuard Firebox and XTM appliances, an unauthenticated user can execute arbitrary code.

    cisa.gov
  • CVE.orgVulnerability recordCVE-2022-26318

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2022-26318

    30-day exploitation probability 78.2%

    first.org
  • Metasploit ModulesPublic exploit moduleexploit_linux/http/watchguard_firebox_unauth_rce_cve_2022_26318

    Public module reference (good). Module source is not copied into this catalog.

    rapid7.com
  • NIST NVDVulnerability recordCVE-2022-26318

    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.

    nvd.nist.gov
  • VulnCheck KEVConfirmed exploitationCVE-2022-26318

    On WatchGuard Firebox and XTM appliances, an unauthenticated user can execute arbitrary code.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.