What’s Vulnerable › Vulnerabilities
CVE-2026-13046: Fireware OS Deserialization of Untrusted Data in samld Allows Remote Code Execution
- Severity: high (CVSS 7.2 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-09-30 · updated 2026-10-08
- Weakness: CWE-502
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.
Affected products
- WatchGuard Fireware OS: from 12.0 before 12.11.10; from 12.12 before 12.12.3; from 2025.0 before 2026.2.3; from 2026.3 before 2026.3.2 — fixed in 12.11.10, 12.12.3, 2026.2.3, 2026.3.2
How to fix
Upgrade to a fixed version: WatchGuard Fireware OS 12.11.10, 12.12.3, 2026.2.3, 2026.3.2. Check the vendor advisory for mitigations.
References
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