OnlyFm252
Windows Cluster Client Failover

CVE-2022-24489 — Cluster Client Failover (CCF) Elevation of Privilege Vulnerability

Important CVSS 7.8 EPSS 0.00476 2022-04 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 Apr 12 2022
Last Updated Apr 12 2022
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.00476 — 0.37336 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

0.00476
probability of exploitation in the next 30 days
0.37336 percentile - updated 2026-06-21
View on FIRST.org

Affected Products

7 affected products
Product KB Article Severity Impact Restart Required
Windows Server 2016 5012596 (Security Update) Important Elevation of Privilege Yes
Windows Server 2016 (Server Core installation) 5012596 (Security Update) Important Elevation of Privilege Yes
Windows Server 2019 5012647 (Security Update) Important Elevation of Privilege Yes
Windows Server 2019 (Server Core installation) 5012647 (Security Update) Important Elevation of Privilege Yes
Windows Server 2022 5012604 (Security Update) Important Elevation of Privilege Yes
Windows Server 2022 (Server Core installation) 5012604 (Security Update) Important Elevation of Privilege Yes
Windows Server, version 20H2 (Server Core Installation) 5012599 (Security Update) Important Elevation of Privilege Yes

Patches

4 patches
Article Type Restart
5012596 Security Update Yes
5012647 Security Update Yes
5012604 Security Update Yes
5012599 Security Update Yes

Known Exploits

Acknowledgments

k0shl with Kunlun Lab

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