CVE-2021-23906 json
An issue was discovered in the Headunit NTG6 in the MBUX Infotainment System on Mercedes-Benz vehicles through 2021.
published 2021-05-13 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-10829
- cvss
- 1.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.8%
- EPSS 0.8% chance of exploitation in 30 days, percentile 56%
- public exploits
- 0
- none known
Summary
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.
Exploit prediction
0.80% chance of exploitation in the next 30 days, higher than 56% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- keenlab.tencent.com https://keenlab.tencent.com/en/whitepapers/Mercedes_Benz_Security_Research_Report_Final.pdf referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 1.8 | CVSS:3.1/AC:H/AV:P/A:N/C:N/I:L/PR:N/S:U/UI:R |
| CNA | 3.1 | 1.8 | CVSS:3.1/AV:P/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N |
| NVD | 3.1 | 6.8 | CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 2.1 | AV:L/AC:L/Au:N/C:P/I:N/A:N |
Classification
- Weakness
-
- CWE-20 Improper Input Validation
References
-
keenlab.tencent.com
/en/whitepapers/Mercedes_Benz_Security_Research_Report_Final.pdf
exploit, third-party-advisory
-
media.daimler.com
/marsMediaSite/en/instance/ko.xhtml?oid=49946866
third-party-advisory
-
keenlab.tencent.com
/en/2021/05/12/Tencent-Security-Keen-Lab-Experimental-Security-Assessment-on-Mercedes-Benz-Cars/
third-party-advisory
Sources
- CVE List CVE-2021-23906
- NVD CVE-2021-23906
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.