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CVE-2025-33073

Windows SMB Client Elevation of Privilege Vulnerability

Published: Jun 10, 2025Updated: Oct 27, 2025 Sources: CVE List NVD BDU
NVD MITRE
8.8CVSS
HIGH

Improper access control in Windows SMB allows an authorized attacker to elevate privileges over a network.

EPSS Score
44.3%
Top 2.4%
CISA KEV
Active Exploitation
Since Oct 20, 2025
Exploits
No Known Exploits
Remediation
Patch Available

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High

Weaknesses

CWE-284

Affected Products

Windows 10 Version 1507
Microsoft
Operating Systems / windows
Windows 10 Version 1607
Microsoft
Operating Systems / windows
Windows 10 Version 1809
Microsoft
Operating Systems / windows
Windows 10 Version 21H2
Microsoft
Operating Systems / windows
Windows 10 Version 22H2
Microsoft
Operating Systems / windows
microsoftcommercialUSOperating Systems
and 60 more affected products View all →

Exploitability

CISA Known Exploited Vulnerability
Added to KEV:Oct 20, 2025
Remediation due:Nov 10, 2025

Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Official Patch Available
Workaround Available

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-33073
msrc.microsoft.com
https://www.vicarius.io/vsociety/posts/cve-2025-33073-detection-script-improper-access-control-in-windows-smb-affects-microsoft-products
vicarius.io
https://www.vicarius.io/vsociety/posts/cve-2025-33073-mitigation-script-improper-access-control-in-windows-smb-affects-microsoft-products
vicarius.io
and 6 more references View all →

Timeline

Published
Jun 10, 2025
Added to CISA KEV
Oct 20, 2025
Last Updated
Oct 27, 2025
News mentions
3

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