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CVE-2021-23910

30
FAUCET Score

CVE-2021-23910 describes a critical out-of-bounds array access vulnerability in the HERMES 2.1 MBUX Infotainment System found in various Mercedes-Benz vehicle models through 2021. This flaw, with a CVSS score of 9.8, allows for unauthenticated remote exploitation, potentially leading to complete compromise of confidentiality, integrity, and availability of the affected system. While no public exploit code or active exploitation has been observed, the vulnerability has garnered some community discussion and media coverage, indicating awareness within the security community.

Impacted Technologies

VendorProductVersion(s)CPE
2.1CPE matchmatch criteria
cpe:2.3:a:mercedes-benz:hermes:2.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
1.8
Impact Score
3.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.74%
Probability of exploitation in next 30 days
EPSS Percentile
75.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0174 is in the 63rd percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

keenlab.tencent.com / en/2021/05/12/Tencent-Security-Keen-Lab-Experimental-Security-Assessment-on-Mercedes-Benz-Cars
Third Party Advisory
keenlab.tencent.com / en/whitepapers/Mercedes_Benz_Security_Research_Report_Final.pdf
ExploitThird Party Advisory
media.daimler.com / marsMediaSite/en/instance/ko.xhtml
Third Party Advisory