CVE-2025-59206HighCVSS 7.4

Windows Resilient File System (ReFS) Deduplication Service Elevation of Privilege Vulnerability

Published
October 14, 2025
Last Modified
—

🔗 CVE IDs covered (1)

CVE-2025-59206 →

📋 Description

What privileges could be gained by an attacker who successfully exploited this vulnerability? An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.

According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability? Successful exploitation of this vulnerability requires an attacker to win a race condition.

🎯 Affected products6

  • Windows 11 Version 24H2 for ARM64-based Systems
  • Windows 11 Version 24H2 for x64-based Systems
  • Windows 11 Version 25H2 for ARM64-based Systems
  • Windows 11 Version 25H2 for x64-based Systems
  • Windows Server 2025
  • Windows Server 2025 (Server Core installation)

✅ Remediation

KB5066835 (Security Update) — fixed build 10.0.26200.6899 KB5066835 (Security Update) — fixed build 10.0.26100.6899

🔗 References (3)