Buffer Overflow in Open Vehicle Monitoring System 3

Publication date: 2026-05-01

Last updated on: 2026-05-20

Assigner: MITRE

Description

Buffer overflow vulnerability in Open Vehicle Monitoring System 3 (OVMS3) 3.3.005. In canformat_canswitch.cpp the parser does not properly validate a CANswitch DLC value, allowing remote attackers to cause a denial of service or possibly execute arbitrary code via crafted CANswitch frames.

CVSS Scores

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Meta Information

Published

2026-05-01

Last Modified

2026-05-20

Generated

2026-07-06

AI Q&A

2026-05-01

EPSS Evaluated

2026-07-05

NVD

CVE-2026-42469

EUVD

EUVD-2026-26697

Affected Vendors & Products

Vendor	Product	Version / Range
openvehicles	open_vehicle_monitoring_system_firmware	3.3.005

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
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).

Attack-Flow Graph

Executive Summary

This vulnerability is a buffer overflow in the Open Vehicle Monitoring System 3 (OVMS3) version 3.3.005. Specifically, in the file canformat_canswitch.cpp, the parser does not properly validate the CANswitch DLC value. This improper validation allows remote attackers to send specially crafted CANswitch frames that can trigger the buffer overflow.

Impact Analysis

Exploitation of this vulnerability can allow remote attackers to cause a denial of service (DoS) on the affected system. Additionally, it may be possible for attackers to execute arbitrary code, potentially gaining control over the system.

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