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CVE-2021-36797: In Victron Energy Venus OS through 2.72, root access is granted by default to anyone with physical access to t

29
Routine
MEDIUM 6.8UPGRADE

CVE-2021-36797 is a medium-severity flaw (CVSS 6.8) affecting venus os. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In Victron Energy Venus OS through 2.72, root access is granted by default to anyone with physical access to the device. NOTE: the vendor disagrees with the reporter's opinion about an alleged "security best practices" violation

Why this priority

  • No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score6.8 (Medium)
Attack vectorPhysical
Attack complexityLow
Privileges neededNone
User interactionNone
EPSS exploit chance0.3% (top 81%)
CISA exploited listNo
Published2021-07-19
Last modified2026-06-17
Publisher (CNA): MITRE · Vendor: victronenergy

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

Am I affected?

Timeline

victronenergy venus os UPGRADE
Affected: <= 2.72
Fixed in: newer than 2.72
Safe to downgrade to: no unaffected older release
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-2021-36797?

venus os: upgrade to newer than 2.72. Exact commands for each OS are on this page.

Is CVE-2021-36797 being exploited?

CVE-2021-36797 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-2021-36797 affect?

CVE-2021-36797 affects venus os. Severity is medium (CVSS 6.8). In Victron Energy Venus OS through 2.72, root access is granted by default to anyone with physical access to the device. NOTE: the vendor disagrees with the reporter's opinion about an alleged "security best practices" violation

How urgent is CVE-2021-36797?

Priority 29/100. No elevated risk signals yet.

References

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