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CVE-2022-24521

Microsoft Windows CLFS Driver Privilege Escalation

7.8 HIGHActively exploited (CISA KEV)Used in ransomwareEPSS 7.08%
  1. Published15 Apr 2022
  2. Added to CISA KEV13 Apr 2022
  3. Remediation due4 May 2022
Actively exploited (CISA KEV)

Microsoft Windows Common Log File System (CLFS) Driver contains an unspecified vulnerability that allows for privilege escalation.

Added to KEV: 13 Apr 2022Federal remediation due: 4 May 2022Used in ransomware

Description

Windows Common Log File System Driver Elevation of Privilege Vulnerability

CVSS 3.1 breakdown

Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Microsoft Windows 10 1507< 10.0.10240.19265
Microsoft Windows 10 1607< 10.0.14393.5066
Microsoft Windows 10 1809≤ 10.0.17763.2803
Microsoft Windows 10 1909< 10.0.18363.2212
Microsoft Windows 10 20h2< 10.0.19042.1645
Microsoft Windows 10 21h1< 10.0.19043.1645
Microsoft Windows 10 21h2< 10.0.19044.1645
Microsoft Windows 11 21h2< 10.0.22000.613
Microsoft Windows 7all versions
Microsoft Windows 8.1all versions
Microsoft Windows Rt 8.1all versions
Microsoft Windows Server 2008r2
Microsoft Windows Server 2012r2
Microsoft Windows Server 2016< 10.0.14393.5066
Microsoft Windows Server 2019< 10.0.17763.2803
Microsoft Windows Server 2022< 10.0.20348.643
Microsoft Windows Server 20h2< 10.0.19042.1645

Remediation

Fixed in
Microsoft Windows 10 1507≥ 10.0.10240.19265
Microsoft Windows 10 1607≥ 10.0.14393.5066
Microsoft Windows 10 1909≥ 10.0.18363.2212
Microsoft Windows 10 20h2≥ 10.0.19042.1645
Microsoft Windows 10 21h1≥ 10.0.19043.1645
Microsoft Windows 10 21h2≥ 10.0.19044.1645
Microsoft Windows 11 21h2≥ 10.0.22000.613
Microsoft Windows Server 2016≥ 10.0.14393.5066
Microsoft Windows Server 2019≥ 10.0.17763.2803
Microsoft Windows Server 2022≥ 10.0.20348.643

References

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Frequently asked

Is CVE-2022-24521 being actively exploited?

Yes. CVE-2022-24521 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 13 Apr 2022. It has been used in ransomware campaigns.

How severe is CVE-2022-24521?

CVE-2022-24521 has a CVSS 3.1 base score of 7.8, rated high. EPSS estimates a 7.08% probability of exploitation.

Which products are affected by CVE-2022-24521?

Affected products include Microsoft Windows 10 1507, Microsoft Windows 10 1607, Microsoft Windows 10 1809, Microsoft Windows 10 1909, Microsoft Windows 10 20h2, and 12 more.

How do I fix CVE-2022-24521?

Upgrade affected software to a fixed version, for example Microsoft Windows 10 1507 10.0.10240.19265, Microsoft Windows 10 1607 10.0.14393.5066, Microsoft Windows 10 1909 10.0.18363.2212 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2022-24521 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.