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CVE-2026-13046
Fireware OS Deserialization of Untrusted Data in samld Allows Remote Code Execution
High7.5EPSS 0.37%
- Published
- Updated
- Reserved
- Assigned by
- WatchGuard
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
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| WatchGuardCNA (assigner) | 4.0 | High7.5 | 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 |
| NVDNVD · Analyzed | 4.0 | High7.5 | 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 |
- EPSS (exploitation in 30 days)
- 0.37% · top 69% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Weakness
Affected products
- affected 2026.3 – < 2026.3.2
- affected 2025.0 – < 2026.2.3
- affected 12.0 – < 12.12.3
- affected 12.11 – < 12.11.10
What to do
Solution: Fireware OS 2026.2.3, Fireware OS 12.12.3, Fireware OS 12.11.10
Exploitation: WatchGuard is not aware of any exploitation of this vulnerability in the wild.
References (1)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-13046)Record last updated .