CVE-2026-41286: CWE-121 in WatchGuard WatchGuard Agent
Stack-based Buffer Overflow vulnerability in the WatchGuard Agent discovery service on Windows allows Overflow Buffers. An unauthenticated attacker on the same local network could exploit this vulnerability to crash the agent service.
AI Analysis
Technical Summary
This vulnerability involves a stack-based buffer overflow in the WatchGuard Agent discovery service running on Windows platforms. An attacker without authentication but on the same local network can exploit this flaw to overflow buffers, leading to a crash of the agent service. The CVSS 4.0 vector indicates the attack requires local network access (AV:A), low attack complexity (AC:L), no privileges or user interaction (PR:N/UI:N), and results in high impact on availability (VI:H). No vendor advisory or patch information is currently available.
Potential Impact
Exploitation of this vulnerability can cause a denial of service by crashing the WatchGuard Agent service. There is no indication of privilege escalation, data confidentiality loss, or integrity compromise. The impact is limited to service disruption on affected Windows hosts running the vulnerable WatchGuard Agent versions.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restricting local network access to the WatchGuard Agent discovery service may reduce exposure.
CVE-2026-41286: CWE-121 in WatchGuard WatchGuard Agent
Description
Stack-based Buffer Overflow vulnerability in the WatchGuard Agent discovery service on Windows allows Overflow Buffers. An unauthenticated attacker on the same local network could exploit this vulnerability to crash the agent service.
CVSS v4.0
Score 7.1high
Affected software
WatchGuard
WatchGuard Agent
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a stack-based buffer overflow in the WatchGuard Agent discovery service running on Windows platforms. An attacker without authentication but on the same local network can exploit this flaw to overflow buffers, leading to a crash of the agent service. The CVSS 4.0 vector indicates the attack requires local network access (AV:A), low attack complexity (AC:L), no privileges or user interaction (PR:N/UI:N), and results in high impact on availability (VI:H). No vendor advisory or patch information is currently available.
Potential Impact
Exploitation of this vulnerability can cause a denial of service by crashing the WatchGuard Agent service. There is no indication of privilege escalation, data confidentiality loss, or integrity compromise. The impact is limited to service disruption on affected Windows hosts running the vulnerable WatchGuard Agent versions.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restricting local network access to the WatchGuard Agent discovery service may reduce exposure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WatchGuard
- Date Reserved
- 2026-04-20T09:57:56.545Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 69fb6703cbff5d8610070f88
Added to database: 05/06/2026, 16:06:27 UTC
Last enriched: 08/11/2026, 15:09:28 UTC
Last updated: 09/14/2026, 22:01:34 UTC
Views: 129
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