CVE-2021-23906

Name: CVE-2021-23906
Creator: NVD / NIST
Published: 2021-05-13T19:15:07.753+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.8/10EPSS 0.80%

Last modified Jun 17, 2026

CVE-2021-23906 is a medium-severity vulnerability rated 6.8/10 on the CVSS scale. An issue was discovered in the Headunit NTG6 in the MBUX Infotainment System on Mercedes-Benz vehicles through 2021. A Message Length is not checked in the HiQnet Protocol, leading to remote code execution.. EPSS estimates a 0.80% chance of exploitation in the next 30 days.

Description

An issue was discovered in the Headunit NTG6 in the MBUX Infotainment System on Mercedes-Benz vehicles through 2021. A Message Length is not checked in the HiQnet Protocol, leading to remote code execution.

Metrics

CVSS 3.1

6.8/10

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.80%

52.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Mercedes-Benz	Mercedes-Benz User Experience	<= 2021

References

https://keenlab.tencent.com/en/2021/05/12/Tencent-Security-Keen-Lab-Experimental-Security-Assessment-on-Mercedes-Benz-Cars/Third Party Advisory
https://keenlab.tencent.com/en/whitepapers/Mercedes_Benz_Security_Research_Report_Final.pdfExploit, Third Party Advisory
https://media.daimler.com/marsMediaSite/en/instance/ko.xhtml?oid=49946866Third Party Advisory
https://keenlab.tencent.com/en/2021/05/12/Tencent-Security-Keen-Lab-Experimental-Security-Assessment-on-Mercedes-Benz-Cars/Third Party Advisory
https://keenlab.tencent.com/en/whitepapers/Mercedes_Benz_Security_Research_Report_Final.pdfExploit, Third Party Advisory
https://media.daimler.com/marsMediaSite/en/instance/ko.xhtml?oid=49946866Third Party Advisory

Timeline

Published: May 13, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-23906?

How severe is CVE-2021-23906?

CVE-2021-23906 has a CVSS score of 6.8/10 (MEDIUM severity). The EPSS model estimates a 0.80% probability of exploitation in the next 30 days.

How do I fix CVE-2021-23906?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-23906?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST