CVE-2025-54101: Windows SMB Client Remote Code Execution Vulnerability

Overview

Severity

Medium (CVSS 4.8)

CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C

Category

Remote Code Execution

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2025-Sep

Released

2025-09-09

EPSS Score

0.18% (percentile: 39.6%)

Description

Use after free in Windows SMBv3 Client allows an authorized attacker to execute code over a network.

FAQ

According to the CVSS metric, the attack vector is network (AV:N), user interaction is required (UI:R), and privileges required are low (PR:L). What does that mean for this vulnerability? Exploitation of this vulnerability requires an authorized attacker on the domain to wait for a user to initiate a connection to a malicious server that the attacker has set up prior to the user connecting. According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability? Successful exploitation of this vulnerability requires an attacker to win a race condition.

Affected Products (27)

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 11 Version 23H2 for ARM64-based Systems
• Windows 11 Version 23H2 for x64-based Systems
• Windows Server 2022, 23H2 Edition (Server Core installation)
• 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 2012
• Windows Server 2012 (Server Core installation)
• Windows Server 2012 R2
• Windows Server 2012 R2 (Server Core installation)

Security Updates (10)

• 5065428
• 5065432
• 5065306
• 5065429
• 5065431
• 5065425
• 5065430
• 5065427
• 5065509
• 5065507

Acknowledgments

Anonymous

Revision History

• 2025-09-09: Information published.