Open Vehicle Monitoring System 3.3.005 GVRET canformat_gvret.cpp length buffer overflow

Summaryinfo

A vulnerability, which was classified as critical, has been found in Open Vehicle Monitoring System 3.3.005. Affected by this vulnerability is an unknown functionality of the file canformat_gvret.cpp of the component GVRET Handler. The manipulation of the argument length leads to buffer overflow. This vulnerability is uniquely identified as CVE-2026-37541. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as very critical, has been found in Open Vehicle Monitoring System 3.3.005. This issue affects an unknown functionality of the file canformat_gvret.cpp of the component GVRET Handler. The manipulation of the argument length with an unknown input leads to a buffer overflow vulnerability. Using CWE to declare the problem leads to CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Buffer overflow vulnerability in Open Vehicle Monitoring System 3 (OVMS3) 3.3.005. In canformat_gvret.cpp, the length field in GVRET binary data is not properly validated, allowing remote attackers to cause a denial of service or possibly execute arbitrary code via crafted GVRET frames.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-37541 since 04/06/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 05/01/2026).

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 EUVD (EUVD-2026-26694). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Name

• Open Vehicle Monitoring System

Version

• 3.3.005

CPE 2.3info

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CPE 2.2info

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