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CVE-2024-40766

CRITICAL
Published 2024-08-23T06:19:07.229Z
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CVSS Score

V3.1
9.3
/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:L
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.183
probability
of exploitation in the wild

There is a 18.3% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.949
Higher than 94.9% of all CVEs

Attack Vector Metrics

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED

Impact Metrics

Confidentiality
HIGH
Integrity
NONE
Availability
LOW

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.

Understanding This Vulnerability

This Common Vulnerabilities and Exposures (CVE) entry provides detailed information about a security vulnerability that has been publicly disclosed. CVEs are standardized identifiers assigned by MITRE Corporation to track and catalog security vulnerabilities across software and hardware products.

The severity rating (CRITICAL) indicates the potential impact of this vulnerability based on the CVSS (Common Vulnerability Scoring System) framework. Higher severity ratings typically indicate vulnerabilities that could lead to more significant security breaches if exploited. Security teams should prioritize remediation efforts based on severity, exploit availability, and the EPSS (Exploit Prediction Scoring System) score, which predicts the likelihood of exploitation in the wild.

If this vulnerability affects products or systems in your infrastructure, we recommend reviewing the affected products section, checking for available patches or updates from vendors, and implementing recommended workarounds or solutions until a permanent fix is available. Organizations should also monitor security advisories and threat intelligence feeds for updates about active exploitation of this vulnerability.

Available Exploits

No exploits available for this CVE.

Related News

Akira Ransomware bypasses MFA on SonicWall VPNs

Akira ransomware is targeting SonicWall SSL VPNs, bypassing OTP MFA on accounts, likely using stolen OTP seeds. Since July 2025, Akira ransomware has exploited SonicWall SSL VPNs, likely using credentials obtained from the exploitation of the CVE-2024-40766 v…

Securityaffairs.com 2025-09-29 10:52
Akira ransomware exploiting critical SonicWall SSLVPN bug again

The Akira ransomware gang is actively exploiting CVE-2024-40766, a year-old critical-severity access control vulnerability, to gain unauthorized access to SonicWall devices. [...]

BleepingComputer 2025-09-11 16:32
Akira ransomware affiliates continue breaching organizations via SonicWall firewalls

Over a year after SonicWall patched CVE-2024-40766, a critical flaw in its next-gen firewalls, ransomware attackers are still gaining a foothold in organizations by exploiting it. Like last September and earlier this year, the attackers are affiliates of the …

Help Net Security 2025-09-11 14:51
Kritieke kwetsbaarheid in SonicWall SLL VPN's actief uitgebuit

Een kritieke kwetsbaarheid in SonicWall SSL VPN's (CVE-2024-40766) wordt actief misbruikt door de Akira-ransomware voor het ...

Security.nl 2025-09-11 10:38

Affected Products

References

Known Exploited Vulnerability

This vulnerability is actively being exploited in the wild

View KEV Details

Remediation Status

Overdue

Due Date

September 30, 2024

Added to KEV

September 9, 2024

Required Action

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

Affected Product

Vendor/Project: SonicWall
Product: SonicOS

Ransomware Risk

Known Ransomware Use
KEV Catalog Version: 2025.01.24 Released: January 24, 2025

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

⚠ Unreviewed CRITICAL

GHSA-8736-pr6r-r9hr

Advisory Details

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.

CVSS Scoring

CVSS Score

9.0

CVSS Vector

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

Advisory provided by GitHub Security Advisory Database. Published: August 23, 2024, Modified: October 22, 2025

References

Published: 2024-08-23T06:19:07.229Z
Last Modified: 2025-07-28T19:42:57.593Z
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