CVE-2025-33073: Windows SMB Client Elevation of Privilege Vulnerability

Overview

Severity
High (CVSS 8.8)
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Category
Elevation of Privilege
Exploit Status
Not Exploited
Exploitation Likelihood
Less Likely
Publicly Disclosed
Yes
Patch Tuesday
2025-Jun
Released
2025-06-10
Last Updated
2025-06-11
EPSS Score
42.01% (percentile: 97.4%)
CISA KEV
Listed — due 2025-11-10

Description

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

FAQ

What privileges could be gained by an attacker who successfully exploited this vulnerability? An attacker who successfully exploited this vulnerability could gain SYSTEM privileges. How could an attacker exploit this vulnerability? When multiple attack vectors can be used, we assign a score based on the scenario with the higher risk. In one such scenario for this vulnerability, the attacker could convince a victim to connect to an attacker controlled malicious application (for example, SMB) server. Upon connecting, the malicious server could compromise the protocol. How could an attacker exploit the vulnerability? To exploit this vulnerability, an attacker could execute a specially crafted script to coerce the victim machine to connect back to the attacker’s SMB Server using SMB and authenticate. This could result in elevation of privilege.

Known Exploits (8)

  • Microsoft Windows SMB Client Improper Access Control Vulnerability — added 2026-03-09T12:13:03Z
  • Microsoft Windows SMB Client Improper Access Control Vulnerability — added 2025-12-10T03:46:49Z
  • Microsoft Windows SMB Client Improper Access Control Vulnerability — added 2025-11-15T07:35:43Z
  • Microsoft Windows SMB Client Improper Access Control Vulnerability — added 2025-11-14T11:17:00Z
  • Microsoft Windows SMB Client Improper Access Control Vulnerability — added 2025-10-18T13:05:29Z
  • Microsoft Windows SMB Client Improper Access Control Vulnerability — added 2025-06-28T18:17:28Z
  • Microsoft Windows SMB Client Improper Access Control Vulnerability — added 2025-06-15T07:55:03Z
  • Microsoft Windows SMB Client Improper Access Control Vulnerability — added 2025-06-13T12:15:14Z

Detection & Weaponization (1 sources)

Maturity: Exploit

  • GitHub PoC: 8 repositories

Affected Products (37)

Windows

  • Windows 10 Version 1809 for 32-bit Systems
  • Windows 10 Version 1809 for x64-based Systems
  • Windows Server 2019
  • Windows Server 2019 (Server Core installation)
  • Windows Server 2022
  • Windows Server 2022 (Server Core installation)
  • Windows 10 Version 21H2 for 32-bit Systems
  • Windows 10 Version 21H2 for ARM64-based Systems
  • Windows 10 Version 21H2 for x64-based Systems
  • Windows Server 2025 (Server Core installation)
  • Windows 11 Version 23H2 for ARM64-based Systems
  • Windows 11 Version 23H2 for x64-based Systems
  • Windows Server 2022, 23H2 Edition (Server Core installation)
  • Windows 11 Version 24H2 for ARM64-based Systems
  • Windows 11 Version 24H2 for x64-based Systems
  • Windows Server 2025
  • Windows 10 for 32-bit Systems
  • Windows 10 for x64-based Systems
  • Windows 10 Version 1607 for 32-bit Systems
  • Windows 10 Version 1607 for x64-based Systems
  • Windows Server 2016
  • Windows Server 2016 (Server Core installation)

ESU

  • Windows 11 Version 22H2 for ARM64-based Systems
  • Windows 11 Version 22H2 for x64-based Systems
  • Windows 10 Version 22H2 for x64-based Systems
  • Windows 10 Version 22H2 for ARM64-based Systems
  • Windows 10 Version 22H2 for 32-bit Systems
  • Windows Server 2008 for 32-bit Systems Service Pack 2
  • Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
  • Windows Server 2008 for x64-based Systems Service Pack 2
  • Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)
  • Windows Server 2008 R2 for x64-based Systems Service Pack 1
  • Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
  • Windows Server 2012
  • Windows Server 2012 (Server Core installation)
  • Windows Server 2012 R2
  • Windows Server 2012 R2 (Server Core installation)

Security Updates (16)

Acknowledgments

James Forshaw of Google Project Zero, <a href="https://www.redteam-pentesting.de/">RedTeam Pentesting GmbH</a>, Stefan Walter and Daniel Isern with <a href="https://www.syss.de/">SySS GmbH</a>, Ahamada M&#39;Bamba (h1roki), <a href="https://linkedin.com/cameron-stish">Cameron Stish</a> with <a href="https://www.guidepointsecurity.com/">GuidePoint Security</a>, <a href="https://twitter.com/wil_fri3d">Wilfried Bécard</a> with <a href="https://www.synacktiv.com/">Synacktiv</a>, Keisuke Hirata with <a href="https://www.crowdstrike.com/">CrowdStrike</a>

Revision History

  • 2025-06-10: Information published.
  • 2025-06-11: Acknowledgement added. This is an informational change only.