# CVE-2026-41287: WatchGuard Agent stack overflow in discovery service

Source: https://junglewise.ai/threats/cve-2026-41287-watchguard-agent-stack-overflow-in-discovery-service  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-05-06. Updated: 2026-05-11  
License: CC BY 4.0 with a link back

CVE-2026-41287 · Severity: medium · CVSS 6.5 · Published 2026-05-06

A security vulnerability exists in the WatchGuard Agent for Windows, a tool used for managing and monitoring devices. An attacker on the same local network can exploit this flaw to crash the agent service, causing it to stop functioning. This results in a denial-of-service condition that prevents the agent from performing its management and discovery tasks.

Technologies: [Watchguard Agent](https://junglewise.ai/threats/technologies/agent). Vendors: [Watchguard](https://junglewise.ai/threats/vendors/watchguard).

## Quick answers

**Is CVE-2026-41287 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-41287 being exploited in the wild.

**How severe is CVE-2026-41287?** Medium severity, with a CVSS score of 6.5, published 6 May 2026.

**Which products and versions are affected?** WatchGuard WatchGuard Agent up to and including 1.25.02.0000.

**Is there a fix for CVE-2026-41287?** A patch was published on 2026-05-06: Fixed in version 1.25.03.0000 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-41287 attacked?** It is attacked from the adjacent network, in a software library.

**Am I affected by CVE-2026-41287?** Check whether you run Watchguard Agent. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A stack-based buffer overflow (CWE-121) exists within the discovery service component of the WatchGuard Agent for Windows. The vulnerability is triggered when the service processes specially crafted network traffic, leading to a memory corruption event. An unauthenticated attacker located on the same adjacent network (Layer 2) can exploit this to cause a denial-of-service (DoS) by crashing the agent service. The issue affects versions up to and including 1.25.02.0000 and is resolved in version 1.25.03.0000.

## Affected products

- WatchGuard WatchGuard Agent up to and including 1.25.02.0000

## Timeline

- 2026-05-06: disclosed
- 2026-05-06: advisory
- 2026-05-06: patched: Fixed in version 1.25.03.0000

## References

- [https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00010](https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00010)

## Related threats

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- [WatchGuard Agent path traversal remote code execution](https://junglewise.ai/threats/cve-2026-57909-watchguard-agent-path-traversal-remote-code-execution)
- [WatchGuard Agent uncontrolled search path in Windows](https://junglewise.ai/threats/cve-2026-6788-watchguard-agent-uncontrolled-search-path-in-windows)
- [WatchGuard Agent hard-coded cryptographic key in Windows agent](https://junglewise.ai/threats/cve-2026-6787-watchguard-agent-hard-coded-cryptographic-key-in-windows-agent)
- [WatchGuard Agent privilege escalation in patch management component](https://junglewise.ai/threats/cve-2026-41288-watchguard-agent-privilege-escalation-in-patch-management)