CVE-2023-29389: Toyota RAV4 2021 vehicles automatically trust messages from other ECUs on a CAN bus, which allows physically p

This month

MEDIUM 6.8MITIGATE

CVE-2023-29389 is a medium-severity flaw (CVSS 6.8) affecting rav4 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Toyota RAV4 2021 vehicles automatically trust messages from other ECUs on a CAN bus, which allows physically proximate attackers to drive a vehicle by accessing the control CAN bus after pulling the bumper away and reaching the headlight connector, and then sending forged "Key is validated" messages via CAN Injection, as exploited in the wild in (for example) July 2022.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	6.8 (Medium)
Attack vector	Physical
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.7% (top 49%)
CISA exploited list	No
Weakness	CWE-74
Published	2023-04-05
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: toyota

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

Am I affected?

Timeline

2023-04-05 16:15 UTCPublished CVE record published
2026-06-17 05:49 UTCUpdated Record last modified

toyota rav4 firmware MITIGATE

Affected: 2021

Fixed in: no fixed release known

Safe to downgrade to: a release before 2021

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-2023-29389?

rav4 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-29389 being exploited?

CVE-2023-29389 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-2023-29389 affect?

CVE-2023-29389 affects rav4 firmware. Severity is medium (CVSS 6.8). Toyota RAV4 2021 vehicles automatically trust messages from other ECUs on a CAN bus, which allows physically proximate attackers to drive a vehicle by accessing the control CAN bus after pulling the bumper away and reaching the headlight co

How urgent is CVE-2023-29389?

Priority 42/100. Public exploit reference

References

← Back to latest CVEs