CVE-2022-21894

Exploitation

Active exploitation reported. CISA's assessment records credible evidence of exploitation. This record is not in the KEV catalog.

SSVC decision

• ExploitationactiveCISA reports credible evidence of active exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

8.63% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 95.0% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

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

2022-01-11 20:22Z4 YR AGO

Last updated

2025-01-02 18:23Z1 YR AGO

Reserved

2021-12-14

Assigning CNA

microsoft

Record state

PUBLISHED

Severity

Medium (CVSS 4.4)

CNA CVSS vector

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

Weaknesses

• CWE-863Incorrect AuthorizationClass

Data version

5.1

Document digest

ec5e1a88e2248d178ddb387194b32b90bdc18722d58ac2de60ac4a9c6e7956d8

• msrc.microsoft.comSecure Boot Security Feature Bypass Vulnerabilityhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-21894vendor-advisory
• portal.msrc.microsoft.comhttps://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-21894x_refsource_MISC