Jun 2025: Windows SMB Client Elevation of Privilege Vulnerability
CVE-2025-33073 Published on June 10, 2025

Windows SMB Client Elevation of Privilege Vulnerability
Improper access control in Windows SMB allows an authorized attacker to elevate privileges over a network.

Vendor Advisory NVD

Known Exploited Vulnerability

This Microsoft Windows SMB Client Improper Access Control Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. Microsoft Windows SMB Client contains an improper access control vulnerability that could allow for privilege escalation. An attacker could execute a specially crafted malicious script to coerce the victim machine to connect back to the attack system using SMB and authenticate.

The following remediation steps are recommended / required by November 10, 2025: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Weakness Type

What is an Authorization Vulnerability?

The software does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

CVE-2025-33073 has been classified to as an Authorization vulnerability or weakness.

Products Associated with CVE-2025-33073

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Microsoft Windows Server 2008

Microsoft Windows Server 2012

Microsoft Windows 10 1507

Microsoft Windows 10

Microsoft Windows 11

Microsoft Windows 11 23h2

Microsoft Windows 11 24h2

Microsoft Windows Server 2016

Microsoft Windows Server 2019

Microsoft Windows Server 2022

Microsoft Windows Server 2022 23h2

Microsoft Windows Server 2025

Microsoft Windows Server 23h2

Microsoft Windows Server 2008 Sp2

Microsoft Windows Server 2008 R2

Microsoft Windows Server 2012 R2

Affected Versions

Microsoft Windows 10 Version 1507:

Version 10.0.10240.0 and below 10.0.10240.21034 is affected.

Microsoft Windows 10 Version 1607:

Version 10.0.14393.0 and below 10.0.14393.8148 is affected.

Microsoft Windows 10 Version 1809:

Version 10.0.17763.0 and below 10.0.17763.7434 is affected.

Microsoft Windows 10 Version 21H2:

Version 10.0.19044.0 and below 10.0.19044.5965 is affected.

Microsoft Windows 10 Version 22H2:

Version 10.0.19045.0 and below 10.0.19045.5965 is affected.

Microsoft Windows 11 version 22H2:

Version 10.0.22621.0 and below 10.0.22621.5472 is affected.

Microsoft Windows 11 version 22H3:

Version 10.0.22631.0 and below 10.0.22631.5472 is affected.

Microsoft Windows 11 Version 23H2:

Version 10.0.22631.0 and below 10.0.22631.5472 is affected.

Microsoft Windows 11 Version 24H2:

Version 10.0.26100.0 and below 10.0.26100.4349 is affected.

Microsoft Windows Server 2008 R2 Service Pack 1:

Version 6.1.7601.0 and below 6.1.7601.27769 is affected.

Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation):

Version 6.1.7601.0 and below 6.1.7601.27769 is affected.

Microsoft Windows Server 2008 Service Pack 2:

Version 6.0.6003.0 and below 6.0.6003.23351 is affected.

Microsoft Windows Server 2008 Service Pack 2 (Server Core installation):

Version 6.0.6003.0 and below 6.0.6003.23351 is affected.

Microsoft Windows Server 2012:

Version 6.2.9200.0 and below 6.2.9200.25522 is affected.

Microsoft Windows Server 2012 (Server Core installation):

Version 6.2.9200.0 and below 6.2.9200.25522 is affected.

Microsoft Windows Server 2012 R2:

Version 6.3.9600.0 and below 6.3.9600.22620 is affected.

Microsoft Windows Server 2012 R2 (Server Core installation):

Version 6.3.9600.0 and below 6.3.9600.22620 is affected.

Microsoft Windows Server 2016:

Version 10.0.14393.0 and below 10.0.14393.8148 is affected.

Microsoft Windows Server 2016 (Server Core installation):

Version 10.0.14393.0 and below 10.0.14393.8148 is affected.

Microsoft Windows Server 2019:

Version 10.0.17763.0 and below 10.0.17763.7434 is affected.

Microsoft Windows Server 2019 (Server Core installation):

Version 10.0.17763.0 and below 10.0.17763.7434 is affected.

Microsoft Windows Server 2022:

Version 10.0.20348.0 and below 10.0.20348.3807 is affected.

Microsoft Windows Server 2022, 23H2 Edition (Server Core installation):

Version 10.0.25398.0 and below 10.0.25398.1665 is affected.

Microsoft Windows Server 2025:

Version 10.0.26100.0 and below 10.0.26100.4349 is affected.

Microsoft Windows Server 2025 (Server Core installation):

Version 10.0.26100.0 and below 10.0.26100.4349 is affected.

Exploit Probability

EPSS

51.19%

Percentile

97.81%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.