Vulnerability in WatchGuard Fireware OS

[ Description ]Official description

A deserialization of untrusted data vulnerability in WatchGuard Fireware OS's SAML single sign-on session handling (samld) allows an attacker who has already obtained the ability to write files on the appliance to execute arbitrary code in the context of the samld service by causing samld to load a maliciously crafted session file.

[ Fixes ]Fixes and patches

• Patch on psirt.watchguard.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD

[ Advisories ]Government CERT advisories

• NCSC-NL7 Oct 2026NCSC-2026-0404

  Vulnerabilities fixed in WatchGuard Fireware OS Translated from Dutch

  Probability/damage M/HCVE-2026-13046CVE-2026-13224CVE-2026-13225+18 more CVEs
• BSI CERT-Bund29 Sep 2026WID-SEC-2026-3646

  WatchGuard Fireware OS: Multiple vulnerabilities Translated from German

  CVE-2026-86104CVE-2026-86136CVE-2026-86105+12 more CVEs

[ References ]References

• psirt.watchguard.com/CVE-2026-13046PatchVendor Advisory