OnlyFm252
Windows Filter Manager

CVE-2021-31953 — Windows Filter Manager Elevation of Privilege Vulnerability

Important CVSS 7.8 EPSS 0.0055 2021-07 archive

Executive Summary

None

Overview

7.8
CVSS HIGH
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
Category Elevation of Privilege
Released Jul 13 2021
Last Updated Jul 13 2021
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.0055 — 0.41614 percentile
NVD CVSS 7.8 HIGH — matches MSRC

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
ATTACK VECTOR
Local
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
Low
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
High
AVAILABILITY
High
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 6.8

EPSS Score

0.0055
probability of exploitation in the next 30 days
0.41614 percentile - updated 2026-06-21
View on FIRST.org

Affected Products

12 affected products
Product KB Article Severity Impact Restart Required
Windows 10 for 32-bit Systems 5003687 (Security Update) Important Elevation of Privilege Yes
Windows 10 for x64-based Systems 5003687 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1607 for 32-bit Systems 5003638 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1607 for x64-based Systems 5003638 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1809 for 32-bit Systems 5003646 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1809 for ARM64-based Systems 5003646 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1809 for x64-based Systems 5003646 (Security Update) Important Elevation of Privilege Yes
Windows 7 for 32-bit Systems Service Pack 1 5003667 (Monthly Rollup) 5003694 (Security Only) Important Elevation of Privilege 5003233 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.1.7601.25632 Yes 5003667 5003694 Windows 7 for x64-based Systems Service Pack 1 5003667 (Monthly Rollup) 5003694 (Security Only) Important Elevation of Privilege 5003233 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.1.7601.25632 Yes 5003667 5003694 Windows 8.1 for 32-bit systems 5003671 (Monthly Rollup) 5003681 (Security Only) Important Elevation of Privilege 5003209 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.3.9600.20045 6.3.9600.20044 Yes 5003671 5003681 Windows 8.1 for x64-based systems 5003671 (Monthly Rollup) 5003681 (Security Only) Important Elevation of Privilege 5003209 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.3.9600.20045 6.3.9600.20044 Yes 5003671 5003681 Windows RT 8.1 5003671 (Monthly Rollup) Important Elevation of Privilege Yes
Windows Server 2008 for 32-bit Systems Service Pack 2 5003661 (Monthly Rollup) 5003695 (Security Only) Important Elevation of Privilege 5003210 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.0.6003.21137 Yes 5003661 5003695 Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) 5003661 (Monthly Rollup) 5003695 (Security Only) Important Elevation of Privilege 5003210 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.0.6003.21137 Yes 5003661 5003695 Windows Server 2008 for x64-based Systems Service Pack 2 5003661 (Monthly Rollup) 5003695 (Security Only) Important Elevation of Privilege 5003210 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.0.6003.21137 Yes 5003661 5003695 Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) 5003661 (Monthly Rollup) 5003695 (Security Only) Important Elevation of Privilege 5003210 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.0.6003.21137 Yes 5003661 5003695 Windows Server 2008 R2 for x64-based Systems Service Pack 1 5003667 (Monthly Rollup) 5003694 (Security Only) Important Elevation of Privilege 5003233 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.1.7601.25632 Yes 5003667 5003694 Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 5003667 (Monthly Rollup) 5003694 (Security Only) Important Elevation of Privilege 5003233 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.1.7601.25632 Yes 5003667 5003694 Windows Server 2012 5003697 (Monthly Rollup) 5003696 (Security Only) Important Elevation of Privilege 5003208 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.2.9200.23372 Yes 5003697 5003696 Windows Server 2012 (Server Core installation) 5003697 (Monthly Rollup) 5003696 (Security Only) Important Elevation of Privilege 5003208 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.2.9200.23372 Yes 5003697 5003696 Windows Server 2012 R2 5003671 (Monthly Rollup) 5003681 (Security Only) Important Elevation of Privilege 5003209 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.3.9600.20045 6.3.9600.20044 Yes 5003671 5003681 Windows Server 2012 R2 (Server Core installation) 5003671 (Monthly Rollup) 5003681 (Security Only) Important Elevation of Privilege 5003209 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.3.9600.20045 6.3.9600.20044 Yes 5003671 5003681 Windows Server 2016 5003638 (Security Update) Important Elevation of Privilege Yes
Windows Server 2016 (Server Core installation) 5003638 (Security Update) Important Elevation of Privilege Yes
Windows Server 2019 5003646 (Security Update) Important Elevation of Privilege Yes
Windows Server 2019 (Server Core installation) 5003646 (Security Update) Important Elevation of Privilege Yes

Patches

4 patches
Article Type Restart
5003687 Security Update Yes
5003638 Security Update Yes
5003646 Security Update Yes
5003671 Monthly Rollup Yes

Known Exploits

Acknowledgments

Ben Splittgerber

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