Description
A NULL pointer dereference vulnerability in Fireware OS's NetFlow packet-processing feature allows a remote, unauthenticated attacker to cause a denial of service by sending a specially crafted IPv6 packet.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| WatchGuard | Fireware OS | 2026.3 – < 2026.3.2, 2025.0 – < 2026.2.3, 12.0 – < 12.12.3, 12.0 – < 12.5.21 | 2026.3.2 |
Advisories 2
- NCSC-2026-0404 Kwetsbaarheden verholpen in WatchGuard Fireware OS NCSC-NL (Netherlands) · Oct 7, 2026
- WID-SEC-2026-3646 WatchGuard Fireware OS: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 29, 2026
References
- https://psirt.watchguard.com/CVE-2026-86128 vendor-advisory