CVE-2021-23906

An issue was discovered in the Headunit NTG6 in the MBUX Infotainment System on Mercedes-Benz...

1.8 Low

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.

Attack profile

How easy it is to exploit

Attack vector: Physical
Complexity: High
Privileges needed: None
User interaction: Required

What an attacker can affect

Confidentiality: None
Integrity: Low
Availability: None

Exploit likelihood

0.80%Down 1.0 points since May 14, 2021

What each source reports

CVE List Score used 1.8

Record: CVE-2021-23906
CVSS 3.1: 1.8 LowCVSS:3.1/AC:H/AV:P/A:N/C:N/I:L/PR:N/S:U/UI:R
Updated: 2026-11-02

EUVDEUVD-2021-10829 1.8

Record: EUVD-2021-10829
CVSS 3.1: 1.8 LowCVSS:3.1/AC:H/AV:P/A:N/C:N/I:L/PR:N/S:U/UI:R
Updated: 2026-11-03

GitHub AdvisoriesGHSA-jx2c-9rxg-v58w No score

An issue was discovered in the Headunit NTG6 in the MBUX Infotainment System on Mercedes-Benz...

Record: GHSA-jx2c-9rxg-v58w
Weakness: CWE-20
Updated: 2026-11-02

NVD 1.8

Record: CVE-2021-23906
CVSS 3.1: 1.8 LowCVSS:3.1/AV:P/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
CVSS 3.1: 6.8 MediumCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 2.1 LowAV:L/AC:L/Au:N/C:P/I:N/A:N
Weakness: CWE-20
Updated: 2026-11-02

Affected products

mercedes-benz user experience

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-23906 is a low vulnerability (CVSS 1.8) in Mercedes-benz User Experience, published May 13, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.80%, the 56th percentile. No source names a fixed version.