CVE-2026-78008: CWE-787 in WatchGuard Fireware OS
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.
CVSS v4.0
Score 8.6high
Affected software
WatchGuard
Fireware OS
WatchGuard
Fireware OS
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-787) in WatchGuard Fireware OS arises from a buffer overflow in the Management Web UI component. An authenticated administrator with network access can exploit this flaw by sending crafted network traffic to trigger a denial of service or possibly execute arbitrary code. The CVSS 4.0 vector indicates network attack vector, low attack complexity, no user interaction, and high privileges required. The vulnerability is confirmed published but lacks an official fix or patch at this time.
Potential Impact
Successful exploitation can lead to denial of service conditions or potentially arbitrary code execution on the affected Fireware OS device. This could disrupt network security management or allow an attacker with administrative network access to compromise the device's integrity and availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict administrative network access to trusted personnel only and monitor for unusual activity. No official fix or temporary mitigation is currently documented by WatchGuard.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WatchGuard
- Date Reserved
- 2026-08-21T21:46:38.156Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a90ed89acd9273b494754a2
Added to database: 08/28/2026, 02:08:09 UTC
Last enriched: 09/07/2026, 12:52:37 UTC
Last updated: 10/11/2026, 06:48:18 UTC
Views: 59
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