Description
A heap-based buffer overflow vulnerability in the Fireware OS authentication service allows an attacker who controls or intercepts traffic to the configured Active Directory server to create a denial of service condition and potentially execute arbitrary code by returning a specially crafted response.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| WatchGuard | Fireware OS | 2025.1 – < 2026.4, 12.0 – < 12.12.4, 12.0 – < 12.5.22 | 2026.4 |
Advisories 1
- WID-SEC-2026-4209 WatchGuard Fireware OS: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 27, 2026
References
- https://psirt.watchguard.com/CVE-2026-112709 vendor-advisory