CVE-2026-13046

Fireware OS Deserialization of Untrusted Data in samld Allows Remote Code Execution

State: Published
Severity: 7.5 High
Published: Sep 29, 2026
Updated: Oct 1, 2026
Reserved: Jun 23, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	7.5 High	CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N	WatchGuard

Weaknesses

CWE-502

Affected Products

Product	Versions
Fireware OSWatchGuard	2026.3 to before 2026.3.2Affected 2025.0 to before 2026.2.3Affected 12.0 to before 12.12.3Affected
Fireware OSWatchGuard	12.11 to before 12.11.10Affected

References

https://psirt.watchguard.com/CVE-2026-13046vendor-advisory

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