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WatchGuard Agent EUVD-2026-27828

| CVE-2026-41287 HIGH
Stack-based Buffer Overflow (CWE-121)
2026-05-06 WatchGuard GHSA-5w53-ghhh-45v8
7.1
CVSS 4.0
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CVSS VectorNVD

CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

3
Analysis Generated
May 06, 2026 - 17:00 vuln.today
Patch available
May 06, 2026 - 16:02 EUVD
CVSS changed
May 06, 2026 - 15:22 NVD
7.1 (HIGH)

DescriptionNVD

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.

AnalysisAI

Stack-based buffer overflow in WatchGuard Agent's discovery service allows adjacent network attackers to crash the agent service without authentication. Affects Windows installations prior to version 1.25.03.0000. …

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RemediationAI

Within 24 hours: Inventory all WatchGuard Agent installations on Windows systems and identify those running versions prior to 1.25.03.0000. Within 7 days: Deploy vendor patch to version 1.25.03.0000 or later across all affected endpoints using your standard patch management process; prioritize internet-facing and critical infrastructure systems. …

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EUVD-2026-27828 vulnerability details – vuln.today

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