CVE-2025-60709Public exploit

Privilege escalation via unchecked CLFS data read

Published Nov 11, 2025 · Updated Feb 26, 2026

An out-of-bounds read in the Windows Common Log File System driver allows local users to elevate privileges on affected Windows systems. The clfs.sys driver does not properly validate user-supplied CLFS data before reading past the end of an allocated memory region. Low-privileged local code execution is required; the read can disclose kernel memory and support a chain to kernel-level code execution.

CVSS severity7.8
High
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An out-of-bounds read in the Windows Common Log File System driver allows local users to elevate privileges on affected Windows systems. The clfs.sys driver does not properly validate user-supplied CLFS data before reading past the end of an allocated memory region. Low-privileged local code execution is required; the read can disclose kernel memory and support a chain to kernel-level code execution.

The record

CVE
CVE-2025-60709
Published
Nov 11, 2025
Updated
Feb 26, 2026
Vendor
Microsoft
Product
Windows Server 2019
Classifications
CWE-125, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 11, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.0.17763.0 <10.0.17763.8027

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Microsoft · Windows Server 2019version=10.0.17763.0 <10.0.17763.8027
Microsoft · Windows Server 2025 (Server Core installation)version=10.0.26100.0 <10.0.26100.7171
Microsoft · Windows 11, version 25H2version=10.0.26200.0 <10.0.26200.7171
Microsoft · Windows Server 2016 (Server Core installation)version=10.0.14393.0 <10.0.14393.8594
Microsoft · Windows 11, version 24H2version=10.0.26100.0 <10.0.26100.7171
Microsoft · Windows Server 2012 (Server Core installation)version=6.2.9200.0 <6.2.9200.25768
Microsoft · Windows Server 2012version=6.2.9200.0 <6.2.9200.25768
Microsoft · Windows 10 Version 21H2version=10.0.19044.0 <10.0.19044.6575
Microsoft · Windows Server 2022, 23H2 Edition (Server Core installation)version=10.0.25398.0 <10.0.25398.1965
Microsoft · Windows Server 2016version=10.0.14393.0 <10.0.14393.8594
Microsoft · Windows 11 Version 22H3version=10.0.22631.0 <10.0.22631.6199
Microsoft · Windows Server 2008 R2 Service Pack 1version=6.1.7601.0 <6.1.7601.28021
Microsoft · Windows Server 2008 R2 Service Pack 1 (Server Core installation)version=6.1.7601.0 <6.1.7601.28021
Microsoft · Windows 10 Version 22H2version=10.0.19045.0 <10.0.19045.6575
Microsoft · Windows Server 2012 R2 (Server Core installation)version=6.3.9600.0 <6.3.9600.22869
Microsoft · Windows Server 2019 (Server Core installation)version=10.0.17763.0 <10.0.17763.8027
Microsoft · Windows 11 Version 23H2version=10.0.22631.0 <10.0.22631.6199
Microsoft · Windows 10 Version 1607version=10.0.14393.0 <10.0.14393.8594
Microsoft · Windows Server 2008 Service Pack 2version=6.0.6003.0 <6.0.6003.23624
Microsoft · Windows Server 2022version=10.0.20348.0 <10.0.20348.4405
Microsoft · Windows Server 2025version=10.0.26100.0 <10.0.26100.7171
Microsoft · Windows 10 Version 1809version=10.0.17763.0 <10.0.17763.8027
Microsoft · Windows Server 2012 R2version=6.3.9600.0 <6.3.9600.22869
Microsoft · Windows Server 2008 Service Pack 2 (Server Core installation)version=6.0.6003.0 <6.0.6003.23624

Published CVSS scores

7.8MicrosoftCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1068Exploitation for Privilege Escalation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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