Security Updates for Azure File Sync Agent (August 2025)

high Nessus Plugin ID 250285

Synopsis

The Microsoft Azure File Sync Agent is affected by an elevation of privilege vulnerability.

Description

The Microsoft Azure File Sync Agent running on the remote host is prior to 18.3, 19.x prior to 19.2, 20.x prior to 20.1, or 21.x prior to 21.1. It is, therefore affected by an elevation of privilege vulnerability.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update Microsoft Azure File Sync Agent in accordance with vendor instructions.

See Also

https://msrc.microsoft.com/update-guide/advisory/CVE-2025-53729

http://www.nessus.org/u?3f9550a9

Plugin Details

Severity: High

ID: 250285

File Name: smb_nt_ms25_aug_azure_file_sync_agent.nasl

Version: 1.1

Type: local

Agent: windows

Family: Windows

Published: 8/15/2025

Updated: 8/15/2025

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.4

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C

CVSS Score Source: CVE-2025-53729

CVSS v3

Risk Factor: High

Base Score: 7.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vulnerability Information

CPE: x-cpe:/a:microsoft:azure_file_sync_agent

Required KB Items: installed_sw/Microsoft Azure File Sync Agent

Patch Publication Date: 8/12/2025

Vulnerability Publication Date: 8/12/2025

Reference Information

CVE: CVE-2025-53729

IAVA: 2025-A-0591

MSFT: MS24-5040925, MS24-5056953, MS24-5063486, MS24-5063613, MS24-5063825

MSKB: 5040925, 5056953, 5063486, 5063613, 5063825