Stack-based Buffer Overflow in WatchGuard Agent Discovery Service on Windows Causes Denial of Service - Variant A
Priority LOW 31CWE-121Published · Updated
Key facts
- Attack vector
- Adjacent network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00252 16th percentileScored 2026-11-07
Fix Fixed WatchGuard Agent (WatchGuard): 1.25.03.0000
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| WatchGuard | WatchGuard Agent | 1.0.0.0 to before 1.25.03.0000 | 1.25.03.0000 | Patch available | CNA |
- WatchGuard Agent VendorWatchGuard Affected 1.0.0.0 to before 1.25.03.0000 Fixed in 1.25.03.0000 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:watchguard:agent:*:*:*:*:*:windows:*:* | before 1.25.03.0000 | Vulnerable | WatchGuard |
- cpe:2.3:a:watchguard:agent:*:*:*:*:*:windows:*:* Versions before 1.25.03.0000 Vulnerable ·WatchGuard
Remediation
- Fix · CNA WatchGuard Agent (WatchGuard) Fixed in 1.25.03.0000
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
WatchGuard Agent 1.25.03.0000
3 records Highest priority Priority LOW 3 LOW
Other records, highest priority first
- TI-2026-29894 WatchGuard Agent on Windows Privilege Escalation VulnerabilityPriority LOW 33
- TI-2026-29892 Stack-based Buffer Overflow in WatchGuard Agent Discovery Service on Windows Causes Denial of Service - Variant BPriority LOW 31
Timeline
- 2026-10-02 Threatist record created from CVE-2026-41287
- 2026-10-03 Alias added: GHSA-5w53-ghhh-45v8
References
More WatchGuard Agent vulnerabilities
- TI-2026-05953 Uncontrolled search path in PluginLauncher allows SYSTEM code execution in WatchGuard Agent CVSS 4.0HIGH 8.5
- TI-2026-05952 Usage of a hard-coded cryptographic key in WatchGuard Agent allows inclusion of code into existing process CVSS 4.0HIGH 8.5
- TI-2026-29894 WatchGuard Agent on Windows Privilege Escalation Vulnerability CVSS 4.0HIGH 7.3
- TI-2026-29892 Stack-based Buffer Overflow in WatchGuard Agent Discovery Service on Windows Causes Denial of Service - Variant B CVSS 4.0HIGH 7.1
Sources
- CVE-2026-41287 · CVE Program
- CVE-2026-41287 · NVD
- FIRST EPSS
- GHSA-5w53-ghhh-45v8 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences