OnlyFm252
Windows UEFI

CVE-2022-21899 — Windows Extensible Firmware Interface Security Feature Bypass Vulnerability

Important CVSS 5.5 EPSS 0.0143 2022-01 archive

Executive Summary

None

Overview

5.5
CVSS MEDIUM
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
Category Security Feature Bypass
Released Jan 11 2022
Last Updated Jan 11 2022
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.0143 — 0.69541 percentile
NVD CVSS 5.5 MEDIUM — matches MSRC

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
ATTACK VECTOR
Local
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
Low
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
None
INTEGRITY
None
AVAILABILITY
High
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 4.8

EPSS Score

0.0143
probability of exploitation in the next 30 days
0.69541 percentile - updated 2026-06-21
View on FIRST.org

Affected Products

3 affected products
Product KB Article Severity Impact Restart Required
Windows 10 for 32-bit Systems 5009585 (Security Update) Important Security Feature Bypass Yes
Windows 10 for x64-based Systems 5009585 (Security Update) Important Security Feature Bypass Yes
Windows 7 for 32-bit Systems Service Pack 1 5009610 (Monthly Rollup) 5009621 (Security Only) Important Security Feature Bypass 5008244 Base: 5.5 Temporal: 4.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C 6.1.7601.25829 Yes 5009610 5009621 Windows 7 for x64-based Systems Service Pack 1 5009610 (Monthly Rollup) 5009621 (Security Only) Important Security Feature Bypass 5008244 Base: 5.5 Temporal: 4.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C 6.1.7601.25829 Yes 5009610 5009621 Windows 8.1 for 32-bit systems 5009624 (Monthly Rollup) 5009595 (Security Only) Important Security Feature Bypass 5008263 Base: 5.5 Temporal: 4.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C 6.3.9600.20246 Yes 5009624 5009595 Windows 8.1 for x64-based systems 5009624 (Monthly Rollup) 5009595 (Security Only) Important Security Feature Bypass 5008263 Base: 5.5 Temporal: 4.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C 6.3.9600.20246 Yes 5009624 5009595 Windows RT 8.1 5009624 (Monthly Rollup) Important Security Feature Bypass Yes

Patches

2 patches
Article Type Restart
5009585 Security Update Yes
5009624 Monthly Rollup Yes

Known Exploits

On This Page