CVE-2026-81433

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.

Score

CVSS 4.0 8.7 High

Status

Deferred - 5d1c2695-1a31-4499-88ae-e847036fd7e3

Published

2026-09-29

Last modified

2026-10-01

Weaknesses

CWE-120, CWE-121, CWE-787

Affected products

• Fireware Os (Watchguard)

References

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