Description
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.
Affected products
openvehicles: open vehicle monitoring system firmware; openvehicles: open vehicle monitoring system
References3
- gist.github.com/sgInnora/f4ac66faeefe07a653ceeb3f58cdc381 Third Party Advisory
- github.com/openvehicles/Open-Vehicle-Monitoring-System-3 Product
- github.com/openvehicles/Open-Vehicle-Monitoring-System-3/issues… Issue Tracking
Metrics
- CVSS 3.1
-
10.0
CRITICAL
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H - EPSS — exploit probability
- 1% percentile: 53 · as of 13 November 2026
- CWE
- CWE-121
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.