How severe is CVE-2024-40766?

CVE-2024-40766 has a CVSS 3.1 base score of 9.3 (CRITICAL). EPSS estimates a 18.4% probability of exploitation in the next 30 days. It is listed in the CISA Known Exploited Vulnerabilities catalog.

CVE-2024-40766: SonicWall SonicOS Improper Access Control

CISA Known Exploited Vulnerabilities

SonicWall SonicOS Improper Access Control Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.

Added to KEV

2024-09-09

Remediation due

2024-09-30

Ransomware

Known use

Required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

CISA notes
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2024-0015; https://www.sonicwall.com/support/notices/gen-7-and-newer-sonicwall-firewalls-sslvpn-recent-threat-activity/kA1VN0000000RDG0A2 ; https://nvd.nist.gov/vuln/detail/CVE-2024-40766

Description

An improper access control vulnerability has been identified in the SonicWall SonicOS management access, potentially leading to unauthorized resource access and in specific conditions, causing the firewall to crash. This issue affects SonicWall Firewall Gen 5 and Gen 6 devices, as well as Gen 7 devices running SonicOS 7.0.1-5035 and older versions.

Severity

CVSS 3.1 · CISA9.3 CRITICAL

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

SSVC · CISA-ADP

Exploitationactive

Automatableyes

Technical impactpartial

Exploitation Context

as of October 15, 2026

All KEV statistics→

CISA added CVE-2024-40766 to the KEV catalog 17 days after its CVE record was published. The median for entries added in 2024 is 21.5 days.
It is one of 19 SonicWall entries in the CISA KEV catalog, and the only one added in 2024.
Its current EPSS score (18.4%) is higher than that of 33% of CISA KEV entries.

Affected Products

Vendor	Product	Affected versions
SonicWall	SonicWall SonicOS	5.9.2.14-12o and older versions 6.5.4.14-109n and older versions 7.0.1-5035 and older versions

References

1 Links

Vendor advisories

https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2024-0015

Record Details

Published

2024-08-23

Last updated

2026-09-21

Assigner (CNA)

sonicwall

Credited to

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Tool categories

IAM Tools Application Security Tools

CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.

CVE-2024-40766