CVE-2026-13084: CWE-476 in WatchGuard Fireware OS
A null pointer dereference vulnerability in WatchGuard Fireware OS may allow a remote unauthenticated attacker to create a denial-of-service (DoS) condition by sending specially crafted IKEv2 messages. This vulnerability affects both the Mobile User VPN with IKEv2 and the Branch Office VPN using IKEv2 when configured with a dynamic gateway peer. This vulnerability affects Fireware OS 11.10.2 up to and including 11.12.4_Update1, 12.0 up to and including 12.12 and 2025.1 up to and including 2026.2
AI Analysis
Technical Summary
This vulnerability (CVE-2026-13084) in WatchGuard Fireware OS arises from a null pointer dereference triggered by specially crafted IKEv2 messages sent by a remote unauthenticated attacker. It affects the Mobile User VPN and Branch Office VPN configurations that use IKEv2 with dynamic gateway peers. Successful exploitation results in a denial-of-service condition, disrupting VPN services. The affected versions include Fireware OS 11.10.2 up to and including 11.12.4_Update1, 12.0 up to and including 12.12, and 2025.1 up to and including 2026.2. The CVSS 4.0 base score is 8.7, indicating high severity. No vendor advisory or patch information is currently provided.
Potential Impact
A remote unauthenticated attacker can cause a denial-of-service condition on affected WatchGuard Fireware OS devices by sending crafted IKEv2 messages. This disrupts VPN connectivity for Mobile User VPN and Branch Office VPN configurations using dynamic gateway peers, potentially impacting network availability and remote access.
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 VPN services to untrusted networks and monitor for unusual IKEv2 traffic patterns. No official remediation or temporary fix has been documented.
CVE-2026-13084: CWE-476 in WatchGuard Fireware OS
Description
A null pointer dereference vulnerability in WatchGuard Fireware OS may allow a remote unauthenticated attacker to create a denial-of-service (DoS) condition by sending specially crafted IKEv2 messages. This vulnerability affects both the Mobile User VPN with IKEv2 and the Branch Office VPN using IKEv2 when configured with a dynamic gateway peer. This vulnerability affects Fireware OS 11.10.2 up to and including 11.12.4_Update1, 12.0 up to and including 12.12 and 2025.1 up to and including 2026.2
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-2026-13084) in WatchGuard Fireware OS arises from a null pointer dereference triggered by specially crafted IKEv2 messages sent by a remote unauthenticated attacker. It affects the Mobile User VPN and Branch Office VPN configurations that use IKEv2 with dynamic gateway peers. Successful exploitation results in a denial-of-service condition, disrupting VPN services. The affected versions include Fireware OS 11.10.2 up to and including 11.12.4_Update1, 12.0 up to and including 12.12, and 2025.1 up to and including 2026.2. The CVSS 4.0 base score is 8.7, indicating high severity. No vendor advisory or patch information is currently provided.
Potential Impact
A remote unauthenticated attacker can cause a denial-of-service condition on affected WatchGuard Fireware OS devices by sending crafted IKEv2 messages. This disrupts VPN connectivity for Mobile User VPN and Branch Office VPN configurations using dynamic gateway peers, potentially impacting network availability and remote access.
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 VPN services to untrusted networks and monitor for unusual IKEv2 traffic patterns. No official remediation or temporary fix has been documented.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WatchGuard
- Date Reserved
- 2026-06-23T18:29:23.985Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a46f27f27e9c797194fff91
Added to database: 07/02/2026, 23:21:35 UTC
Last enriched: 08/14/2026, 15:01:24 UTC
Last updated: 08/16/2026, 00:41:10 UTC
Views: 130
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