CVE-2026-13046Fireware OS Deserialization of Untrusted Data in samld Allows Remote Code Execution
Updated under an hour ago ()
Does this affect you?
It affects WatchGuard Fireware OS and 1 other product. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.37%, higher than 29% of scored CVEs.
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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.
- CVSS
- 7.5 HIGH (v4.0, CNA)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
- Weakness (CWE)
- CWE-502
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.37% (percentile 29)
- Assigned by
- WatchGuard
- NVD analysis
- Analyzed
- Record last updated
- Oct 1, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
WatchGuard Fireware OS watchguard:fireware_os (from the name) | from 2026.3 before 2026.3.2; from 2025.0 before 2026.2.3; from 12.0 before 12.12.3 | CNA record |
watchguard fireware watchguard:fireware | 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 | NVD |
References
- https://psirt.watchguard.com/CVE-2026-13046vendor-advisory, patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.