CVE-2026-13046
A deserialization of untrusted data vulnerability in WatchGuard Fireware OS's SAML single sign-on session han…
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.
- Vendor
- watchguard
- Product
- fireware
- CVSS 3.1
- 7.2 (high), scored by NVD (primary)CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- CVSS 4.0
- 7.5 (high), scored by 5d1c2695-1a31-4499-88ae-e847036fd7e3CVSS:4.0/AV:N/AC:L/AT:P/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:X/V:X/RE:X/U:X
- CWE
- CWE-502
- Published
- 2026-09-30
- NVD modified
- 2026-10-08
- NVD status
- Analyzed
Not in the CISA KEV catalogue at the last update.
EPSS
0.37% chance of exploitation in the next 30 days (percentile 29th)
FIRST EPSS, updated 17 Oct 2026. About EPSS
CVSS is severity, EPSS is likelihood, KEV means already exploited. EPSS is a statistical probability, not a certainty: a low score does not make a bug safe, and a high one does not prove it is being exploited.
References
- psirt.watchguard.com (Patch, Vendor Advisory)
Data last updated 18 Oct 2026. Sources: NVD API 2.0, FIRST EPSS. Links: NVD, CISA KEV. Metadata only. ThreatWire does not host exploit code.