CVE-2021-23909
An issue was discovered in HERMES 2.1 in the MBUX Infotainment System on Mercedes-Benz vehicles...
An issue was discovered in HERMES 2.1 in the MBUX Infotainment System on Mercedes-Benz vehicles through 2021. The SH2 MCU allows remote code execution.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- High
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
An issue was discovered in HERMES 2.1 in the MBUX Infotainment System on Mercedes-Benz vehicles through 2021. The SH2 MCU allows remote code execution.
- Record
CVE-2021-23909- CVSS 3.1
- 6.3 Medium
CVSS:3.1/AC:L/AV:L/A:H/C:L/I:H/PR:H/S:U/UI:N - Updated
- 2026-11-02
EUVDEUVD-2021-10832
An issue was discovered in HERMES 2.1 in the MBUX Infotainment System on Mercedes-Benz vehicles through 2021. The SH2 MCU allows remote code execution.
- Record
EUVD-2021-10832- CVSS 3.1
- 6.3 Medium
CVSS:3.1/AC:L/AV:L/A:H/C:L/I:H/PR:H/S:U/UI:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-xgjg-42m3-rrw5 No score
An issue was discovered in HERMES 2.1 in the MBUX Infotainment System on Mercedes-Benz vehicles...
An issue was discovered in HERMES 2.1 in the MBUX Infotainment System on Mercedes-Benz vehicles through 2021. The SH2 MCU allows remote code execution.
- Record
GHSA-xgjg-42m3-rrw5- Weakness
- CWE-787
- Updated
- 2026-11-02
NVD
An issue was discovered in HERMES 2.1 in the MBUX Infotainment System on Mercedes-Benz vehicles through 2021. The SH2 MCU allows remote code execution.
- Record
CVE-2021-23909- CVSS 3.1
- 6.3 Medium
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:H - CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-787
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-23909 is a medium vulnerability (CVSS 6.3) in Mercedes-benz Hermes, published May 13, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.36%, the 83rd percentile. No source names a fixed version.
References
media.daimler.com/marsMediaSite/en/instance/ko.xhtml?oid=49946866
keenlab.tencent.com/en/2021/05/12/Tencent-Security-Keen-Lab-Experimental-Security-Assessment-on-Mercedes-Benz-Cars
nvd.nist.gov/vuln/detail/CVE-2021-23909
github.com/advisories/GHSA-xgjg-42m3-rrw5