CVE-2026-93862#
Fireware OS Out-of-Bounds Read in FireCluster Sync Allows Denial of Service
Summary #
An out-of-bounds read vulnerability in the FireCluster Sync processing allows an attacker positioned on the cluster interconnect, such as a compromised cluster peer or an on-path network attacker, to repeatedly crash the firewall's cluster synchronization process by sending specially crafted network traffic, resulting in a sustained denial of service.
Product status #
| Product | Affected | Not affected |
|---|---|---|
| Fireware OS | ||
| Default | >= 2025.1, < 2026.4, >= 12.0, < 12.12.4 | >= 2026.4, >= 12.12.4 |
| T15/T35 | >= 12.0, < 12.5.22 | >= 12.5.22 |
Required Configuration for Exposure #
This vulnerability affects Firebox devices that are deployed in a FireCluster.
Weakness Type and Impact #
Exploitation Status #
WatchGuard is not aware of any exploitation of this vulnerability in the wild.
Solution #
Fireware OS 2026.4, Fireware OS 12.12.4, Fireware OS 12.5.22
References #
Credits #
- WatchGuard AI Security Researchfinder