How severe is CVE-2022-26318?

CVE-2022-26318 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2022-26318 being actively exploited?

Yes. CVE-2022-26318 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-03-25, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2022-26318?

CVE-2022-26318 primarily affects Watchguard Fireware. In total, 11 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2022-26318?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2022-26318 have an EU (EUVD) identifier?

Yes. CVE-2022-26318 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2022-30879. It is also flagged as exploited in the EUVD (since 2022-03-25).

When was CVE-2022-26318 published?

CVE-2022-26318 was published on 2022-03-04 and last updated on 2026-06-17.

CVE-2022-26318

CVE-2022-26318 is a critical-severity vulnerability in Watchguard Fireware with a CVSS 3.x base score of 9.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2022-03-25).

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 78% (100th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2022-03-25)
EU (EUVD) id: EUVD-2022-30879
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2022-03-25)
Affected product: Watchguard Fireware
Published: 2022-03-04
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-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.
How severe is CVE-2022-26318?: CVE-2022-26318 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2022-26318 being actively exploited?: Yes. CVE-2022-26318 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-03-25, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2022-26318?: CVE-2022-26318 primarily affects Watchguard Fireware. In total, 11 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2022-26318?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2022-26318 have an EU (EUVD) identifier?: Yes. CVE-2022-26318 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2022-30879. It is also flagged as exploited in the EUVD (since 2022-03-25).
When was CVE-2022-26318 published?: CVE-2022-26318 was published on 2022-03-04 and last updated on 2026-06-17.

References

Affected products (11)

cpe:2.3:o:watchguard:fireware:*:*:*:*:*:*:*:*
cpe:2.3:o:watchguard:fireware:12.1.3:*:*:*:*:*:*:*
cpe:2.3:o:watchguard:fireware:12.1.3:u1:*:*:*:*:*:*
cpe:2.3:o:watchguard:fireware:12.1.3:u2:*:*:*:*:*:*
cpe:2.3:o:watchguard:fireware:12.1.3:u3:*:*:*:*:*:*
cpe:2.3:o:watchguard:fireware:12.1.3:u4:*:*:*:*:*:*
cpe:2.3:o:watchguard:fireware:12.1.3:u5:*:*:*:*:*:*
cpe:2.3:o:watchguard:fireware:12.1.3:u6:*:*:*:*:*:*
cpe:2.3:o:watchguard:fireware:12.1.3:u7:*:*:*:*:*:*
cpe:2.3:o:watchguard:fireware:12.5.9:u1:*:*:*:*:*:*
cpe:2.3:o:watchguard:fireware:12.7.2:u1:*:*:*:*:*:*

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