A buffer overflow vulnerability in the WatchGuard Fireware OS Management Web UI allows an authenticated administrator with network access to cause a denial of service (DoS) condition or potentially execute arbitrary code by sending specially crafted network traffic.

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Advisories

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Fixes

Solution

Fireware OS 2026.2.2, Fireware OS 12.12.2, Fireware OS 12.5.20


Workaround

Administrators should not expose the Firebox's management interfaces to untrusted network locations. See our Firebox Remote Management Best Practices (https://techsearch.watchguard.com/KB?type=Article&SFDCID=kA10H000000XeAtSAK&lang=en_US) KB article for guidance on how to secure remote management to a Firebox.

History

Thu, 27 Aug 2026 18:00:00 +0000

Type Values Removed Values Added
Description A buffer overflow vulnerability in the WatchGuard Fireware OS Management Web UI allows an authenticated administrator with network access to cause a denial of service (DoS) condition or potentially execute arbitrary code by sending specially crafted network traffic.
Title Fireware OS Authenticated Buffer Overflow in wgagent
First Time appeared Watchguard
Watchguard fireware Os
Weaknesses CWE-787
CPEs cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*
Vendors & Products Watchguard
Watchguard fireware Os
References
Metrics cvssV4_0

{'score': 8.6, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: WatchGuard

Published:

Updated: 2026-08-28T17:37:45.621Z

Reserved: 2026-08-21T21:46:38.156Z

Link: CVE-2026-78008

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-08-28T02:16:22.167

Modified: 2026-08-28T20:19:56.550

Link: CVE-2026-78008

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-28T11:15:03Z

Weaknesses