CVE-2026-81433 — Fireware OS Pre-Authentication Stack Buffer Overflow in fingerd Allows Remote Code Execution

CVE-2026-81433

Fireware OS Pre-Authentication Stack Buffer Overflow in fingerd Allows Remote Code Execution PUBLISHED

Description (CNA)

A stack-based buffer overflow vulnerability in WatchGuard Fireware OS's DHCP fingerprinting daemon (fingerd) allows an unauthenticated attacker with adjacent network access to execute arbitrary code or crash the process by sending a specially crafted DHCP packet.

Affected (CNA)

Vendor / product	Versions
WatchGuard / Fireware OS	affected 2026.3 before 2026.3.2; affected 2025.0 before 2026.2.3; affected 12.0 before 12.12.3

CWE

CWE-120, CWE-121, CWE-787

References

https://psirt.watchguard.com/CVE-2026-81433

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.