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CVE-2023-23376

Microsoft Windows Common Log File System (CLFS) Driver Privilege Escalation

7.8 HIGHActively exploited (CISA KEV)Used in ransomwareEPSS 10.9%
  1. Published14 Feb 2023
  2. Added to CISA KEV14 Feb 2023
  3. Remediation due7 Mar 2023
Actively exploited (CISA KEV)

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

Added to KEV: 14 Feb 2023Federal remediation due: 7 Mar 2023Used 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< 10.0.10240.19747
Microsoft Windows 10 1607< 10.0.14393.5717
Microsoft Windows 10 1809< 10.0.17763.4010
Microsoft Windows 10 20h2< 10.0.19042.2604
Microsoft Windows 10 21h2< 10.0.19044.2604
Microsoft Windows 10 22h2< 10.0.19045.2604
Microsoft Windows 11 21h2< 10.0.22000.1574
Microsoft Windows 11 22h2< 10.0.22621.1265
Microsoft Windows Server 2008r2
Microsoft Windows Server 2012r2
Microsoft Windows Server 2016< 10.0.14393.5717
Microsoft Windows Server 2019< 10.0.17763.4010
Microsoft Windows Server 2022< 10.0.20348.1540

Remediation

Fixed in
Microsoft Windows 10 1507≥ 10.0.10240.19747
Microsoft Windows 10 1607≥ 10.0.14393.5717
Microsoft Windows 10 1809≥ 10.0.17763.4010
Microsoft Windows 10 20h2≥ 10.0.19042.2604
Microsoft Windows 10 21h2≥ 10.0.19044.2604
Microsoft Windows 10 22h2≥ 10.0.19045.2604
Microsoft Windows 11 21h2≥ 10.0.22000.1574
Microsoft Windows 11 22h2≥ 10.0.22621.1265
Microsoft Windows Server 2016≥ 10.0.14393.5717
Microsoft Windows Server 2019≥ 10.0.17763.4010

References

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Frequently asked

Is CVE-2023-23376 being actively exploited?

Yes. CVE-2023-23376 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 14 Feb 2023. It has been used in ransomware campaigns.

How severe is CVE-2023-23376?

CVE-2023-23376 has a CVSS 3.1 base score of 7.8, rated high. EPSS estimates a 10.9% probability of exploitation.

Which products are affected by CVE-2023-23376?

Affected products include Microsoft Windows 10 1507, Microsoft Windows 10 1607, Microsoft Windows 10 1809, Microsoft Windows 10 20h2, Microsoft Windows 10 21h2, and 8 more.

How do I fix CVE-2023-23376?

Upgrade affected software to a fixed version, for example Microsoft Windows 10 1507 10.0.10240.19747, Microsoft Windows 10 1607 10.0.14393.5717, Microsoft Windows 10 1809 10.0.17763.4010 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2023-23376 against the real software inventory on every managed device, as each hourly inventory arrives. 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, a risk for it never ranks below high, and the update that fixes it moves to the Emergency patch lane. 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.