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Vulnerability record · CVE-2026-13722 · published 3 July 2026

CVE-2026-13722: Watchguard fireware improper verification of cryptographic signature vulnerability

Watchguard · Fireware

WatchGuard Fireware OS contains a firmware validation bypass when processing a backup image via the backup/restore feature. An authenticated administrator can exploit this vulnerability to install a tampered firmware image.

8.6 CVSS 4.0 High EPSS 0.33% · top 76.2% CWE-347 · Improper verification of cryptographic signature
8.6CVSS 4.0 base score
0.33%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
28 Aug 2026Last modified by NVD

Description

WatchGuard Fireware OS contains a firmware validation bypass when processing a backup image via the backup/restore feature. An authenticated administrator can exploit this vulnerability to install a tampered firmware image.

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://psirt.watchguard.com/CVE-2026-13722 Broken Link
https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00022 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-13722), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.