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TI-2026-11098 Aliases CVE-2026-13046GHSA-4m89-w9gx-fh8p

Fireware OS Deserialization of Untrusted Data in samld Allows Remote Code Execution

Priority LOW 35CWE-502Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-502.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00369 31st percentileScored 2026-11-07
Fix Fixed Fireware OS (WatchGuard): 2026.3.2, 2026.2.3, 12.12.3 +1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
WatchGuardFireware OS2026.3 to before 2026.3.2; 2025.0 to before 2026.2.3; 12.0 to before 12.12.32026.3.2, 2026.2.3, 12.12.3Patch availableCNA
WatchGuardFireware OS12.11 to before 12.11.1012.11.10Patch availableCNA
  • Fireware OS VendorWatchGuard Affected 2026.3 to before 2026.3.2; 2025.0 to before 2026.2.3; 12.0 to before 12.12.3 Fixed in 2026.3.2, 2026.2.3, 12.12.3 Patch available CNA
  • Fireware OS VendorWatchGuard Affected 12.11 to before 12.11.10 Fixed in 12.11.10 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:watchguard:fireware:*:*:*:*:*:*:*:*12.0 to before 12.11.10; 12.12 to before 12.12.3; 2025.0 to before 2026.2.3; 2026.3 to before 2026.3.2VulnerableWatchGuard
  • cpe:2.3:o:watchguard:fireware:*:*:*:*:*:*:*:* Versions 12.0 to before 12.11.10; 12.12 to before 12.12.3; 2025.0 to before 2026.2.3; 2026.3 to before 2026.3.2 Vulnerable ·WatchGuard

Remediation

  • Fix · CNA Fireware OS (WatchGuard) Fixed in 2026.3.2, 2026.2.3, 12.12.3
  • Fix · CNA Fireware OS (WatchGuard) Fixed in 12.11.10

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    WatchGuard Fireware OS 12.12.3, 2026.2.3, 2026.3.2

    14 records Highest priority Priority MEDIUM 4 MEDIUM, 10 LOW

    Other records, highest priority first

    • TI-2026-58925 Fireware OS Code Injection in BOVPN Over TLS Client Allows Remote Code ExecutionPriority MEDIUM 48
    • TI-2026-58904 Fireware OS Resource Exhaustion in Login Process Allows Denial of ServicePriority MEDIUM 44
    • TI-2026-58926 Fireware OS Pre-Authentication Integer Underflow in iked Allows Denial of ServicePriority MEDIUM 42
    Show all 14 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-13046
  2. 2026-10-03 Alias added: GHSA-4m89-w9gx-fh8p
  3. 2026-10-09 CVSS score added · NVD

References

Patch 1

  • TI-2022-09698 On WatchGuard Firebox and XTM appliances, an unauthenticated user can execute arbitrary… KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-13451 WatchGuard Firebox iked Out of Bounds Write Vulnerability KEVCVSS 4.0CRITICAL 9.3
  • TI-2025-08474 WatchGuard Firebox iked Out of Bounds Write Vulnerability KEVCVSS 4.0CRITICAL 9.3
  • TI-2022-07330 WatchGuard Firebox and XTM appliances allow a remote attacker with unprivileged… KEVCVSS 3.1HIGH 8.8
  • TI-2013-05132 Buffer overflow in WGagent in WatchGuard WSM and Fireware before 11.8 allows remote… CVSS 2.0HIGH 9.3
  • TI-2026-02885 WatchGuard Firebox Out of Bounds Write Vulnerability CVSS 4.0HIGH 8.6
See all 73 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences