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CVE-2025-29973

19
FAUCET Score

CVE-2025-29973 is an improper access control vulnerability in Microsoft Azure File Sync that allows an authorized attacker to achieve local privilege escalation. Rated 7.0 HIGH, this vulnerability requires low privileges and high attack complexity, but can lead to high impact on confidentiality, integrity, and availability. While not currently in the KEV catalog or Hot List, and with no public exploit code available, it has garnered some community discussion and media coverage, indicating awareness within the cybersecurity community.

Impacted Technologies

VendorProductVersion(s)CPE
19.0.0.0CPE matchmatch criteria
cpe:2.3:a:microsoft:azure_file_sync:19.0.0.0:*:*:*:*:*:*:*
20.0.0.0CPE matchmatch criteria
cpe:2.3:a:microsoft:azure_file_sync:20.0.0.0:*:*:*:*:*:*:*
>= 1.0.0, < 26100CPE match
cpe:2.3:a:microsoft:azure_file_sync:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.0HIGH

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 Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.0
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.28%
Probability of exploitation in next 30 days
EPSS Percentile
20.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0028 is in the 53rd percentile among its peer group of 1,516 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.4 InfoSec Media, 0.1 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

microsoftpatch availablevia msrc
Product: Azure File Sync v19Fixed in: 26100
microsoftpatch availablevia msrc
Product: Azure File Sync v20Fixed in: 5041884
microsoftvendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

microsoft2025-May/CVE-2025-29973Important

Microsoft Azure File Sync Elevation of Privilege Vulnerability

May 13, 2025

References

msrc.microsoft.com / update-guide/vulnerability/CVE-2025-29973
Vendor Advisory