What is the CVSS score of CVE-2025-29973?

CVE-2025-29973 has a CVSS 3.1 base score of 7.0 (High). CVSS vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.2%.

Which versions of Azure File Sync are affected by CVE-2025-29973?

Organizations using Improper access control in Azure File Sync face moderate risk from CVE-2025-29973, a improper access control vulnerability rated CVSS 7.0.

How to fix or mitigate CVE-2025-29973?

Within 30 days: Identify all affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Azure File Sync CVE-2025-29973

HIGH

Improper Access Control (CWE-284)

2025-05-13 secure@microsoft.com

Microsoft Authentication Bypass Azure File Sync

7.0

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.0 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:41 vuln.today

CVE Published

May 13, 2025 - 17:15 nvd

HIGH 7.0

DescriptionCVE.org

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

AnalysisAI

Improper access control in Azure File Sync allows an authorized attacker to elevate privileges locally. Rated high severity (CVSS 7.0). No vendor patch available.

Technical ContextAI

This vulnerability is classified under CWE-284. Improper access control in Azure File Sync allows an authorized attacker to elevate privileges locally. Affected products include: Microsoft Azure File Sync.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.