CVE-2025-40601

HIGH EXPLOITED

SonicOS 7.1.1-7040 to <7.3.1-7013 - Unauthenticated Denial of Service via SSLVPN Stack-based Buffer Overflow

Title source: llm

Exploitation Summary

CVE-2025-40601 has been observed exploited in the wild (reported by VulnCheck KEV).

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 (1)

Core 1

Core References

Vendor Advisory vendor-advisory

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

Scores

CVSS v3 7.5

EPSS 0.0004

EPSS Percentile 14.0%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

VulnCheck KEV 2026-05-10

CWE

CWE-121

Status published

Products (1)

sonicwall/sonicos 7.1.1-7040 - 7.3.1-7013

Published Nov 20, 2025

Tracked Since Feb 18, 2026