WatchGuard TechnologiesCVE-2026-13046
WatchGuard Technologies Fireware OS: unsafe deserialization
High7.5CVE-2026-13046 · Published Sep 30, 2026 · updated Oct 1, 2026
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 versions
| Package | Affected | Fixed in |
|---|---|---|
| Fireware OS Product | >= 2026.3, < 2026.3.2 | 2026.3.2 |
| >= 2025.0, < 2026.2.3 | 2026.2.3 | |
| >= 12.0, < 12.12.3 | 12.12.3 | |
| >= 12.11, < 12.11.10 | 12.11.10 |
Details and references
- CVSS 4.0
- 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/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
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-502
More WatchGuard Technologies advisories
All WatchGuard Technologies| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Sep 30 | WatchGuard Technologies Fireware OS: null pointer dereference | High8.7 | 2026.3.2+3 more |
| Sep 30 | WatchGuard Technologies Fireware OS: integer overflow | High8.2 | 2026.3.2+3 more |
| Sep 30 | WatchGuard Technologies Fireware OS: missing authorization | High7.1 | 2026.3.2+3 more |
| Sep 30 | WatchGuard Technologies Fireware OS: missing authorization | High7.1 | 2026.3.2+3 more |
| Sep 30 | WatchGuard Technologies Fireware OS: stack buffer overflow | High8.6 | 2026.3.2+3 more |
| Sep 30 | WatchGuard Technologies Fireware OS: stack buffer overflow | High8.7 | 2026.3.2+2 more |