CVE-2025-53729: Microsoft Azure File Sync Elevation of Privilege Vulnerability

Overview

Severity

High (CVSS 7.8)

CVSS Vector

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

Category

Elevation of Privilege

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2025-Aug

Released

2025-08-12

EPSS Score

0.07% (percentile: 21.3%)

Description

Improper access control in Azure File Sync allows an authorized attacker to elevate privileges locally.

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.

Affected Products (4)

Azure

• Azure File Sync v18
• Azure File Sync v19
• Azure File Sync v20
• Azure File Sync v21

Security Updates (4)

• Release Notes
• Release Notes
• Release Notes
• Release Notes

Acknowledgments

Michal Kamensky with Microsoft

Revision History

• 2025-08-12: Information published.