Critical severity · published Aug 23, 2024
CVE-2024-40766
SonicWall SonicOS Improper Access Control Vulnerability
RansomwareIn wildKEV
9.8
CVSS
18.4%
EPSS
Yes
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)18.4% · higher than 97% of CVEs
Exploited in the wildYes
CISA KEVListed Sep 9, 2024
Federal remediation dueSep 30, 2024
Ransomware campaign useKnown
Affected products
Which versions
SO
SonicOS · SonicWall
5.9.2.14-12o and older versions; 6.5.4.14-109n and older versions; 7.0.1-5035 and older versions · source: vendor, NVD, KEV
In the news
RansomwareHigh
#StopRansomware: SafePay Ransomware
Advisory at a Glance Title #StopRansomware: SafePay Ransomware Original Publication  October 20, 2026 Executive Summary This advisory details recent activity by the SafePay ransomware group. SafePay actors have been highly active since August 2024, targeting businesses and critical infrastructure across North America, South America, Europe, and Australia. SafePay actors typically gain access to networks by stealing or guessing passwords, exploiting vulnerabilities in security systems, and using phishing tactics.  Once inside the network, SafePay actors establish control by creating new accounts or taking over existing ones. They then use legitimate system tools to move through the network, identify valuable files, and disable security protections to avoid detection. Following, they encrypt the victim’s files, making them inaccessible, and leave a ransom note demanding payment in cryptocurrency. This advisory urges organizations to follow recommended security measures to reduce the risk and impact of SafePay ransomware attacks. Affected Products CVE-2020-3259 [ Common Weakness Enumeration (CWE)-200: Exposure of Sensitive Information to an Unauthorized Actor ] CVE-2023-20269 [ CWE-288: Authentication Bypass Using an Alternate Path or Channel ] CVE-2023-27532 [ CWE-306: Missing Authentication for Critical Function ] CVE-2024-40711 [ CWE-502: Deserialization of Untrusted Data ] CVE-2024-40766 [ CWE-284: Impr...
Oct 20, 2026·CISA Advisories
VulnerabilityHigh
Jun 23, 2026·SANS Internet Storm Center
Affected product
SO
SonicOS
SonicWall
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