CVE-2021-23909

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

2.36% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 82.3% of scored records. A rank, not a probability.

NVD base score

9.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2021-05-13 18:57Z5 YR AGO

Last updated

2024-08-03 19:14Z2 YR AGO

Reserved

2021-01-12

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Medium (CVSS 6.3)

CNA CVSS vector

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

Weaknesses

• CWE-787Out-of-bounds WriteBase

Data version

5.1

Document digest

66af167b54095ab2e4e5a2be4a6e91c3454aedfdc0f82fe0f65c4891e4892747

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