OnlyFm252
Windows Cluster Port Driver

CVE-2022-21910 — Microsoft Cluster Port Driver Elevation of Privilege Vulnerability

Important CVSS 7.8 EPSS 0.00599 2022-01 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 Jan 11 2022
Last Updated Jan 11 2022
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.00599 — 0.43935 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

0.00599
probability of exploitation in the next 30 days
0.43935 percentile - updated 2026-06-21
View on FIRST.org

Affected Products

7 affected products
Product KB Article Severity Impact Restart Required
Windows Server 2016 5009546 (Security Update) Important Elevation of Privilege Yes
Windows Server 2016 (Server Core installation) 5009546 (Security Update) Important Elevation of Privilege Yes
Windows Server 2019 5009557 (Security Update) Important Elevation of Privilege Yes
Windows Server 2019 (Server Core installation) 5009557 (Security Update) Important Elevation of Privilege Yes
Windows Server 2022 5009555 (Security Update) Important Elevation of Privilege Yes
Windows Server 2022 (Server Core installation) 5009555 (Security Update) Important Elevation of Privilege Yes
Windows Server, version 20H2 (Server Core Installation) 5009543 (Security Update) Important Elevation of Privilege Yes

Patches

4 patches
Article Type Restart
5009546 Security Update Yes
5009557 Security Update Yes
5009555 Security Update Yes
5009543 Security Update Yes

Known Exploits

Acknowledgments

JIWO Technology Co., Ltd

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