What is CVE-2021-23908?

CVE-2021-23908 is a low-severity vulnerability in Mercedes-Benz A 220, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 2.9/10. Published 2021-05-13.

How severe is CVE-2021-23908?

Low severity. CVSS v3 base score is 2.9 out of 10.

Vulnerability in Mercedes-Benz A 220

CVE-2021-23908

An issue was discovered in the Headunit NTG6 in the MBUX Infotainment System on Mercedes-Benz vehicles through 2021. A type confusion issue affects MultiSvSetAttributes in the HiQnet Protocol, leading to remote code execution.

Published 2021-05-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 2.9 (Low). Vector: CVSS:3.1/AV:P/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.024 (83.1th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 83.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.024 · newest: 0.024 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-843 — Access of Resource Using Incompatible Type (Type Confusion)

References

media.daimler.com/marsMediaSite/en/instance/ko.xhtml (Third Party Advisory)
keenlab.tencent.com/en/2021/05/12/Tencent-Security-Keen-Lab-Experimental-Securi… (Third Party Advisory)
keenlab.tencent.com/en/whitepapers/Mercedes_Benz_Security_Research_Report_Final… (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-23908?: CVE-2021-23908 is a low-severity vulnerability in Mercedes-Benz A 220, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 2.9/10. Published 2021-05-13.
How severe is CVE-2021-23908?: Low severity. CVSS v3 base score is 2.9 out of 10.