CVE-2026-37541: Buffer overflow vulnerability in Open Vehicle Monitoring System 3 (OVMS3) 3.3.005

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CRITICAL 10.0REMOTEMITIGATE

CVE-2026-37541 is a critical-severity flaw (CVSS 10.0) affecting open vehicle monitoring system firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	10.0 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.7% (top 48%)
CISA exploited list	No
Weakness	CWE-121
Published	2026-05-01
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: openvehicles

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-01 17:16 UTCPublished CVE record published
2026-06-17 10:41 UTCUpdated Record last modified

openvehicles open vehicle monitoring system firmware MITIGATE

Affected: 3.3.005

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.3.005

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-37541?

open vehicle monitoring system firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-37541 being exploited?

CVE-2026-37541 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-37541 affect?

CVE-2026-37541 affects open vehicle monitoring system firmware. Severity is critical (CVSS 10.0). 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 e

How urgent is CVE-2026-37541?

Priority 53/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-42469 HIGH 8.6 MITIGATE Buffer overflow vulnerability in Open Vehicle Monitoring System 3 (OVMS3) 3.3.005
CVE-2026-42468 HIGH 8.8 MITIGATE Buffer overflow vulnerability in Open Vehicle Monitoring System 3 (OVMS3) 3.3.005

References

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