7.5

CVE-2025-40601: sonicwall sonicos Stack-based Buffer Overflow

CVSS: 7.5v3.1HighAnalyzed
Published 20-11-2025Last modified 20-11-2025
Open JSON

Vulnerability summary

CVE-2025-40601 is a high (CVSS 7.5) Stack-based Buffer Overflow vulnerability in sonicwall sonicos. EPSS estimates a 1.17% chance of exploitation in the next 30 days, higher than 66.8% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
1.17%
0%100%
Low · -0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 20-11-2025
    PublishedVulnerability first disclosed.
  2. 20-11-2025
    Last modifiedVulnerability information updated.

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.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

1.17%

Chance of exploitation in the next 30 days

Percentile

67%

Versus all other CVEs

30-day change

-0.01 pp

From 1.18% on 18-09-2026

18-09-202618-10-2026
EPSS score
1.17%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Sonicwall1 product
  • sonicos7.3.0-7012 and older versions | 8.0.2-8011 and older versions | ≥ 7.1.1-7040, < 7.3.1-7013 | < 8.0.3-8011

1 vendor · 1 product

References

1 links