Service crash via invalid discovery communications
Published May 6, 2026 · Updated May 6, 2026
Stack-based buffer overflow in the WatchGuard Agent discovery service before 1.25.03.0000 allows remote attackers on the local network to crash it. Invalid discovery communications overrun a stack buffer, but WatchGuard has not disclosed the parsed field or unsafe copy operation. The attack requires adjacent-network access and interrupts only the agent discovery service; no code execution or broader host compromise is reported.
Summary
What happened
Stack-based buffer overflow in the WatchGuard Agent discovery service before 1.25.03.0000 allows remote attackers on the local network to crash it. Invalid discovery communications overrun a stack buffer, but WatchGuard has not disclosed the parsed field or unsafe copy operation. The attack requires adjacent-network access and interrupts only the agent discovery service; no code execution or broader host compromise is reported.
The record
- CVE
- CVE-2026-41286
- Published
- May 6, 2026
- Updated
- May 6, 2026
- Vendor
- WatchGuard Technologies
- Product
- WatchGuard Agent
- Classifications
- CWE-121, T1499
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 6, 2026CVE publishedPublication date reported by the CVE source.
- May 6, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <1.25.03.0000
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo