CVE-2025-40601

High · 7.5

CVSS

7.5

EPSS

0.9%

Published

Nov 20, 2025

CISA due date

—

The record

A Stack-based buffer overflow vulnerability in the SonicOS SSLVPN service allows a remote unauthenticated attacker to cause Denial of Service (DoS), which could cause an impacted firewall to crash.

Affected packages

Ecosystem	Package	Introduced	Fixed