CVE-2025-40601

high

Description

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.

References

Advisories
References

https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2025-0016

https://www.securityweek.com/sonicwall-patches-high-severity-flaws-in-firewalls-email-security-appliance/

https://www.bleepingcomputer.com/news/security/new-sonicwall-sonicos-flaw-allows-hackers-to-crash-firewalls/

Details

Source: Mitre, NVD

Published: 2025-11-20

Updated: 2025-11-21

Risk Information

CVSS v2

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Severity: High

CVSS v3

Base Score: 7.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H