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
Published: 2026-07-02
Score: 8.7 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

A null pointer dereference exists in the IKEv2 (iked) process of WatchGuard Fireware OS, enabling a remote unauthenticated attacker to send specially crafted IKEv2 messages that crash the VPN daemon and trigger a denial‑of‑service condition. The flaw is a classic CWE‑476 null pointer dereference and impacts only the VPN service, interrupting connectivity for users.

Affected Systems

The vulnerability affects WatchGuard Fireware OS versions 11.10.2 through 11.12.4_Update1, 12.0 through 12.12, and 2025.1 through 2026.2. Both the Mobile User susceptible.

Risk and Exploitability

The the flaw as high severity, while the EPSS score of less than 1% indicates a very low exploitation probability. The vulnerability is not listed in CISA KEV, meaning no confirmed exploits have been observed. Attackers need only send untrusted IKEv2 traffic to a vulnerable VPN endpoint, no authentication is required, making the attack vector remote and straightforward.

Generated by OpenCVE AI on August 1, 2026 at 20:59 UTC.

Remediation

Vendor Solution

Fireware OS 2026.2.1, Fireware OS 12.12.1, Fireware OS 12.5.19

OpenCVE Recommended Actions

  • Apply the latest firmware update that addresses the null pointer dereference in the IKEv2 process.
  • If patching is delayed, restrict inbound IKEv2 traffic to known, trusted peers or temporarily disable IKEv2 on the vulnerable VPN configuration.
  • Deploy network monitoring or intrusion detection rules to flag abnormal IKEv2 traffic patterns that may indicate exploitation attempts.

Generated by OpenCVE AI on August 1, 2026 at 20:59 UTC.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

Mon, 10 Aug 2026 19:30:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:11.10.2
cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:12.0
cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:12.5
cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:2025.1		 cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*
References

Mon, 06 Jul 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Thu, 02 Jul 2026 23:30:00 +0000

Type Values Removed Values Added
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
Title Null Pointer Dereference in WatchGuard Fireware OS iked Process
First Time appeared Watchguard
Watchguard fireware Os
Weaknesses CWE-476
CPEs cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:11.10.2
cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:12.0
cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:12.5
cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:2025.1
Vendors & Products Watchguard
Watchguard fireware Os
References
Metrics cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}

Subscriptions

Watchguard Fireware Os
cve-icon MITRE

Status: PUBLISHED

Assigner: WatchGuard

Published:

Updated: 2026-08-10T19:06:10.746Z

Reserved: 2026-06-23T18:29:23.985Z

Link: CVE-2026-13084

cve-icon Vulnrichment

Updated: 2026-07-06T14:54:44.629Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-07-03T00:16:50.767

Modified: 2026-08-10T20:17:26.117

Link: CVE-2026-13084

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-01T21:00:08Z

Weaknesses