CVE-2026-90464 Fireware OS Missing Command Validation allows Authenticated Arbitrary File Modification as Root
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-90464?
CVE-2026-90464 is a high-severity vulnerability in WatchGuard Fireware OS, published on 27 Oct 2026.
Official description
An external control of file path vulnerability in a WatchGuard Fireware OS firewall diagnostic command allows a remote, authenticated attacker with at least read-only (Device Monitor) privileges and access to the management CLI to create, truncate, or overwrite arbitrary files and modify kernel parameters with root privileges by submitting a specially crafted command. Written content is limited to numeric values.
Which versions are affected by CVE-2026-90464?
How do I fix CVE-2026-90464?
No fix has been published for CVE-2026-90464 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-90464 being exploited?
There is no known exploitation of CVE-2026-90464 in the wild and no public exploit code.
Sources
Also known as GHSA-4766-2fhj-r6g2.