Microsoft Azure File Sync vulnerabilities

4 CVEs affecting Microsoft Azure File Sync, 0 known to be exploited (CISA KEV), with EPSS scores. Latest: CVE-2025-53729, published 2025-08-12.

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Known exploited (CISA KEV) first, then by EPSS exploit probability.

• CVE-2024-35253, published 2024-06-11. Medium severity, CVSS 4.4. EPSS: 0.7% chance of exploitation in the next 30 days. Microsoft Azure File Sync Elevation of Privilege Vulnerability
• CVE-2024-21397, published 2024-02-13. Medium severity, CVSS 5.3. EPSS: 0.5% chance of exploitation in the next 30 days. Microsoft Azure File Sync Elevation of Privilege Vulnerability
• CVE-2025-29973, published 2025-05-13. High severity, CVSS 7.0. EPSS: 0.3% chance of exploitation in the next 30 days. Improper access control in Azure File Sync allows an authorized attacker to elevate privileges locally.
• CVE-2025-53729, published 2025-08-12. High severity, CVSS 7.8. EPSS: 0.3% chance of exploitation in the next 30 days. Improper access control in Azure File Sync allows an authorized attacker to elevate privileges locally.