What’s Vulnerable › Vulnerabilities

CVE-2021-23909

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-05-13 · updated 2026-06-17
• Weakness: CWE-787

Description

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.

Affected products

• Mercedes-Benz Hermes: 2.1

References

• https://keenlab.tencent.com/en/2021/05/12/Tencent-Security-Keen-Lab-Experimental-Security-Assessment-on-Mercedes-Benz-Cars/
• https://keenlab.tencent.com/en/whitepapers/Mercedes_Benz_Security_Research_Report_Final.pdf
• https://media.daimler.com/marsMediaSite/en/instance/ko.xhtml?oid=49946866
• https://keenlab.tencent.com/en/2021/05/12/Tencent-Security-Keen-Lab-Experimental-Security-Assessment-on-Mercedes-Benz-Cars/
• https://keenlab.tencent.com/en/whitepapers/Mercedes_Benz_Security_Research_Report_Final.pdf
• https://media.daimler.com/marsMediaSite/en/instance/ko.xhtml?oid=49946866

Get alerted when CVE-2021-23909 or the next vulnerability affects your stack