CVE-2021-40463

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

2.57% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 84.8% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

2021-10-13 00:27Z5 YR AGO

Last updated

2024-08-04 02:44Z2 YR AGO

Reserved

2021-09-02

Assigning CNA

microsoft

Record state

PUBLISHED

Severity

High (CVSS 7.7)

CNA CVSS vector

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

Weaknesses

No CWE assigned

Data version

5.1

Document digest

c6b87a9c48096527806ae83582583eccf4e50efc9e21f48ec8b735134e97607d

• portal.msrc.microsoft.comhttps://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40463x_refsource_MISC