CVE-2022-21894
Published: 11 January 2022
Summary
CVE-2022-21894 is a medium-severity Incorrect Authorization (CWE-863) vulnerability in Microsoft Windows 10. Its CVSS base score is 4.4 (Medium).
Operationally, ranked in the top 3.0% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
The vulnerability CVE-2022-21894 is described as a Secure Boot Security Feature Bypass Vulnerability. It carries a CVSS 3.1 base score of 4.4 with the vector AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N and is associated with CWE-863 (incorrect authorization). The affected component is the Secure Boot mechanism referenced in Microsoft security guidance.
An attacker with local high-privileged access can exploit the flaw to bypass Secure Boot protections and obtain high-integrity impact on the system while leaving confidentiality and availability unaffected.
Microsoft Security Response Center advisories at the listed URLs provide official guidance and patches for addressing the issue. The associated EPSS score rose from a low baseline to a peak of 0.5338 before receding to the current value of 0.3364, indicating a period of elevated exploitation interest after disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2022-27050
Vulnerability details
Secure Boot Security Feature Bypass Vulnerability
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Periodic review and update of procedures reduces incorrect authorization implementations over time.
Supervision identifies cases where authorization logic incorrectly permits unauthorized actions.
Defining permitted attribute values and auditing modifications reduces the chance of incorrect authorization outcomes due to tampered or missing labels.
The authorization process and usage restrictions help prevent incorrect authorization for remote access types.
Establishing configuration and connection requirements helps ensure correct rather than incorrect authorization for wireless access.
Establishing connection authorization processes for mobile devices helps ensure authorization decisions are correctly implemented rather than incorrect.
Monitoring account use, notifying on changes, and reviewing accounts for compliance corrects incorrect authorization assignments.
Ensures authorization decisions for external system use are correctly implemented and enforced.