CVE-2025-11838: CWE-763 in WatchGuard Fireware OS
A memory corruption vulnerability in WatchGuard Fireware OS may allow an unauthenticated attacker to trigger a Denial of Service (DoS) condition in the Mobile User VPN with IKEv2 and the Branch Office VPN using IKEv2 when configured with a dynamic gateway peer.
AI Analysis
Technical Summary
This vulnerability (CVE-2025-11838) in WatchGuard Fireware OS involves memory corruption that can be exploited without authentication to cause a denial of service in VPN components using IKEv2 with dynamic gateway peers. The affected components are the Mobile User VPN and Branch Office VPN. The CVSS 4.0 vector indicates network attack vector, low attack complexity, no privileges or user interaction required, and high impact on availability. The vulnerability is categorized under CWE-763 (Release of Memory before Removal or Reuse). There is no information on available patches or vendor advisories confirming remediation status.
Potential Impact
An unauthenticated attacker can exploit this vulnerability remotely to cause a denial of service, disrupting VPN connectivity for Mobile User VPN and Branch Office VPN configured with dynamic gateway peers. This impacts availability of VPN services but does not indicate confidentiality or integrity compromise based on the provided data.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, consider limiting exposure of affected VPN services to untrusted networks and monitor for unusual VPN service disruptions. Do not assume the vulnerability is mitigated without vendor confirmation.
CVE-2025-11838: CWE-763 in WatchGuard Fireware OS
Description
A memory corruption vulnerability in WatchGuard Fireware OS may allow an unauthenticated attacker to trigger a Denial of Service (DoS) condition in the Mobile User VPN with IKEv2 and the Branch Office VPN using IKEv2 when configured with a dynamic gateway peer.
CVSS v4.0
Score 8.7high
Affected software
pkg:github/watchguard/fireware-osRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2025-11838) in WatchGuard Fireware OS involves memory corruption that can be exploited without authentication to cause a denial of service in VPN components using IKEv2 with dynamic gateway peers. The affected components are the Mobile User VPN and Branch Office VPN. The CVSS 4.0 vector indicates network attack vector, low attack complexity, no privileges or user interaction required, and high impact on availability. The vulnerability is categorized under CWE-763 (Release of Memory before Removal or Reuse). There is no information on available patches or vendor advisories confirming remediation status.
Potential Impact
An unauthenticated attacker can exploit this vulnerability remotely to cause a denial of service, disrupting VPN connectivity for Mobile User VPN and Branch Office VPN configured with dynamic gateway peers. This impacts availability of VPN services but does not indicate confidentiality or integrity compromise based on the provided data.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, consider limiting exposure of affected VPN services to untrusted networks and monitor for unusual VPN service disruptions. Do not assume the vulnerability is mitigated without vendor confirmation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WatchGuard
- Date Reserved
- 2025-10-16T06:58:57.085Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 693202962bd9ee5f78f6b9fe
Added to database: 12/04/2025, 21:52:22 UTC
Last enriched: 08/11/2026, 15:23:05 UTC
Last updated: 09/10/2026, 19:36:49 UTC
Views: 167
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