CVE-2026-41287 Stack-based Buffer Overflow in WatchGuard Agent Discovery Service on Windows Causes Denial of Service - Variant A
An unauthenticated local network attacker can crash the WatchGuard Agent service via a stack-based buffer overflow.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-41287?
CVE-2026-41287 is a high-severity memory corruption vulnerability in WatchGuard Agent, published on 6 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-121
Which versions are affected by CVE-2026-41287?
It affects 1 product.
Products include Watchguard Agent.
How do I fix CVE-2026-41287?
No fix has been published for CVE-2026-41287 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-41287 being exploited?
There is no known exploitation of CVE-2026-41287 in the wild and no public exploit code.
Other vulnerabilities in WatchGuard Agent
- CVE-2026-6787 Usage of a hard-coded cryptographic key in WatchGuard Agent allows inclusion of code into existing process
- CVE-2026-6788 Uncontrolled search path in PluginLauncher allows SYSTEM code execution in WatchGuard Agent
- CVE-2026-41288 WatchGuard Agent on Windows Privilege Escalation Vulnerability
- CVE-2026-41286 Stack-based Buffer Overflow in WatchGuard Agent Discovery Service on Windows Causes Denial of Service - Variant B
Sources
Also known as GHSA-5w53-ghhh-45v8.