CVE-2025-40601

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.

CVSS 3.1

7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

0.9% chance of exploitation in the next 30 days; higher than 59% of CVEs (scores of 2026-10-25)

CWE

CWE-121

Published

2025-11-20

Modified

2026-10-18

Record from

the NVD, synced 2026-10-19

Affected

• sonicwall:sonicos

References

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

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