Microsoft Azure File Sync Elevation of Privilege Vulnerability
Priority LOW 36CWE-284Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Privilege escalation
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from Microsoft.
Summary
Improper access control in Azure File Sync allows an authorized attacker to elevate privileges locally.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00314 24th percentileScored 2026-11-07
Fix Fixed Azure File Sync (Microsoft): 18.3.0.0
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Microsoft | Azure File Sync | 1.0.0 to before 18.3.0.0 | 18.3.0.0 | Patch available | CNA |
- Azure File Sync VendorMicrosoft Affected 1.0.0 to before 18.3.0.0 Fixed in 18.3.0.0 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:microsoft:azure_file_sync:*:*:*:*:*:*:*:* | 18.0.0.0 to before 18.3.0.0; 19.0.0.0 to before 19.2.0.0; 20.0.0.0 to before 20.1.0.0; 21.0.0.0 – 21.1.0.0 | Vulnerable | Microsoft |
- cpe:2.3:a:microsoft:azure_file_sync:*:*:*:*:*:*:*:* Versions 18.0.0.0 to before 18.3.0.0; 19.0.0.0 to before 19.2.0.0; 20.0.0.0 to before 20.1.0.0; 21.0.0.0 – 21.1.0.0 Vulnerable ·Microsoft
Remediation
- Fix · CNA Azure File Sync (Microsoft) Fixed in 18.3.0.0
Vendor assessments
Microsoft
Microsoft's page for this CVE →
- Impact
- Elevation of Privilege
- Exploited
- No
- Publicly disclosed
- No
- Exploitability
- Exploitation Less Likely
| Product | Status | Plan or fix |
|---|---|---|
| Azure File Sync v18 | Fixed | 18.3.0.0 · Security Update |
| Azure File Sync v19 | Fixed | 19.2.0.0 · Security Update |
| Azure File Sync v20 | Fixed | 20.1.0.0 · Security Update |
| Azure File Sync v21 | Fixed | 21.1.0.0 · Security Update |
Timeline
- 2026-10-02 Threatist record created from CVE-2025-53729
- 2026-10-03 Alias added: GHSA-h6cw-pcv6-jq7g
References
More Microsoft Azure File Sync vulnerabilities
- TI-2025-21349 Microsoft Azure File Sync Elevation of Privilege Vulnerability CVSS 3.1HIGH 7.0
- TI-2024-14157 Microsoft Azure File Sync Elevation of Privilege Vulnerability CVSS 3.1MEDIUM 5.3
- TI-2024-23320 Microsoft Azure File Sync Elevation of Privilege Vulnerability CVSS 3.1MEDIUM 4.4
Sources
- CVE-2025-53729 · CVE Program
- CVE-2025-53729 · NVD
- FIRST EPSS
- GHSA-h6cw-pcv6-jq7g · GitHub Advisory Database · CC BY 4.0
- CVE-2025-53729 · Microsoft Security Update Guide
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences