SonicWALL SMA 100 Web Interface stack-based overflow

Summaryinfo

A vulnerability classified as critical has been found in SonicWALL SMA 100. This affects an unknown function of the component Web Interface. The manipulation leads to stack-based overflow. This vulnerability is referenced as CVE-2025-40596. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in SonicWALL SMA 100 (version now known) and classified as very critical. This issue affects some unknown processing of the component Web Interface. The manipulation with an unknown input leads to a stack-based overflow vulnerability. Using CWE to declare the problem leads to CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). Impacted is confidentiality, integrity, and availability. The summary by CVE is:

A Stack-based buffer overflow vulnerability in the SMA100 series web interface allows remote, unauthenticated attacker to cause Denial of Service (DoS) or potentially results in code execution.

The weakness was published by Sina Kheirkhah as SNWLID-2025-0012. It is possible to read the advisory at psirt.global.sonicwall.com. The identification of this vulnerability is CVE-2025-40596 since 04/16/2025. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/25/2025).

The vulnerability scanner Nessus provides a plugin with the ID 242692 (SonicWall Secure Mobile Access < 10.2.2.1-90sv (SNWLID-2025-0012)), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (242692). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Firewall Software

Vendor

• SonicWALL

Name

• SMA 100

License

• commercial

Website

• Vendor: https://www.sonicwall.com/

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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