TI-2026-11133 Aliases CVE-2026-13086 GHSA-c7m7-329m-9vph

Fireware OS Stack-Based Buffer Overflow in Mobile Security epm Endpoint

MEDIUM 49CWE-121Published 2026-08-27 · Updated 2026-09-03

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-121, CWE-798 and the CVSS impact.

Summary

A stack-based buffer overflow in the epm (Endpoint Protection Manager) service used by the deprecated Mobile Security feature in WatchGuard Fireware OS allows an unauthenticated remote attacker to execute arbitrary code.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00662 51st percentileScored 2026-11-07

Fix Fixed Fireware OS (WatchGuard): 2026.2.2, 12.12.2, 2026.3.1 +1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Total

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

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
WatchGuard	Fireware OS	2025.0 to before 2026.2.2; 12.0 to before 12.12.2; 2026.3 to before 2026.3.1	2026.2.2, 12.12.2, 2026.3.1	Patch available	CNA
WatchGuard	Fireware OS	12.0 to before 12.5.20	12.5.20	Patch available	CNA

Fireware OS VendorWatchGuard Affected 2025.0 to before 2026.2.2; 12.0 to before 12.12.2; 2026.3 to before 2026.3.1 Fixed in 2026.2.2, 12.12.2, 2026.3.1 Patch available CNA
Fireware OS VendorWatchGuard Affected 12.0 to before 12.5.20 Fixed in 12.5.20 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:o:watchguard:fireware::::::::	—	—	WatchGuard

cpe:2.3:o:watchguard:fireware:*:*:*:*:*:*:*:* Versions — — ·WatchGuard

Remediation

Fix · CNA Fireware OS (WatchGuard) Fixed in 2026.2.2, 12.12.2, 2026.3.1
Fix · CNA Fireware OS (WatchGuard) Fixed in 12.5.20

Fixed in the same release

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

Release · 2026-08-27
WatchGuard Fireware OS 12.12.2, 12.5.20 and 2 more versions
9 records Highest priority Priority MEDIUM 8 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2026-15753 Fireware OS Pre-Authentication Type Confusion in iked Allows Remote Code ExecutionPriority MEDIUM 49
- TI-2026-54282 Fireware OS Integer Underflow in Iked Allows Unauthenticated Denial of Service (DoS)Priority MEDIUM 44
- TI-2026-54280 Fireware OS Out-of-Bounds Read in iked Allows Unauthenticated Denial of Service (DoS)Priority MEDIUM 44
Show all 9 records →

Timeline

2026-10-02 Threatist record created from CVE-2026-13086
2026-10-03 Alias added: GHSA-c7m7-329m-9vph
2026-10-25 EPSS moved to the 50th–90th percentile

References

Advisory 1

https://psirt.watchguard.com/CVE-2026-13086

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-2023-19293 A DLL hijacking vulnerability in Panda Security VPN for Windows prior to version v15.14.8… CVSS 3.1MEDIUM 6.5
TI-2015-04587 Watchguard XCS 9.2 and 10.0 before build 150522 allow remote authenticated users to… CVSS 2.0MEDIUM 6.5

See all 203 →

Sources

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