High severity · published Jul 2, 2026
CVE-2026-13084
Null Pointer Dereference in WatchGuard Fireware OS iked Process
7.5
CVSS
0.6%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 49% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FO
Fireware OS · WatchGuard
2025.1 before 2026.2.1; 12.0 before 12.12.1; 11.10.2; 12.0 before 12.11.9; 12.0 before 12.5.19 · source: vendor
FI
Fireware · Watchguard
12.5 before 12.5.19; 11.0.0 before 11.12.4; 11.12.4; 11.12.4; 12.0 before 12.12.1; 2025.1 before 2026.2.1 · source: NVD
In the news
VulnerabilityMedium
ZDI-26-427: WatchGuard FireWare OS iked ike2_hmac Null Pointer Dereference Denial-of-Service Vulnerability
This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of WatchGuard FireWare OS. Authentication is not required to exploit this vulnerability, but only systems using VPN with IKEv2 are vulnerable. The ZDI has assigned a CVSS rating of 5.9. The following CVEs are assigned: CVE-2026-13084.
Jul 15, 2026·Zero Day Initiative
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-13084
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-13084
Broken Link
https://psirt.watchguard.com/CVE-2026-13084
Vendor Advisory
https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00024
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