CVE-2026-103593

A stack-based buffer overflow vulnerability in the Fireware OS logging service allows a network-adjacent attacker who can impersonate or intercept traffic to the configured log server to execute arbitrary code with root privileges by presenting a specially crafted certificate.

Score

CVSS 4.0 9.1 Critical

Status

Awaiting Analysis - 5d1c2695-1a31-4499-88ae-e847036fd7e3

Published

2026-10-27

Last modified

2026-10-28

Weaknesses

CWE-121, CWE-787

Affected products

• Fireware Os (Watchguard)

References

• https://psirt.watchguard.com/CVE-2026-103593