CVE-2025-21391HighCVSS 7.1

Windows Storage Elevation of Privilege Vulnerability

Published
June 3, 2026
Last Modified
—

🔗 CVE IDs covered (1)

CVE-2025-21391 →

📋 Description

What privileges could be gained by an attacker who successfully exploited the vulnerability? An attacker would be able to delete targeted files on a system.

According to the CVSS metrics, successful exploitation of this vulnerability could lead to no loss of confidentiality (C:N), but could lead to major loss on integrity (I:H) and availability (A:H). What does that mean for this vulnerability? This vulnerability does not allow disclosure of any confidential information, but could allow an attacker to delete data that could include data that results in the service being unavailable.

🎯 Affected products27

  • Windows 10 Version 1607 for 32-bit Systems
  • Windows 10 Version 1607 for x64-based Systems
  • Windows 10 Version 1809 for 32-bit Systems
  • Windows 10 Version 1809 for x64-based Systems
  • Windows 10 Version 21H2 for 32-bit Systems
  • Windows 10 Version 21H2 for ARM64-based Systems
  • Windows 10 Version 21H2 for x64-based Systems
  • Windows 10 Version 22H2 for 32-bit Systems
  • Windows 10 Version 22H2 for ARM64-based Systems
  • Windows 10 Version 22H2 for x64-based Systems
  • Windows 10 for 32-bit Systems
  • Windows 10 for x64-based Systems
  • Windows 11 Version 22H2 for ARM64-based Systems
  • Windows 11 Version 22H2 for x64-based Systems
  • Windows 11 Version 23H2 for ARM64-based Systems
  • Windows 11 Version 23H2 for x64-based Systems
  • Windows 11 Version 24H2 for ARM64-based Systems
  • Windows 11 Version 24H2 for x64-based Systems
  • Windows Server 2016
  • Windows Server 2016 (Server Core installation)
  • Windows Server 2019
  • Windows Server 2019 (Server Core installation)
  • Windows Server 2022
  • Windows Server 2022 (Server Core installation)
  • Windows Server 2022, 23H2 Edition (Server Core installation)
  • Windows Server 2025
  • Windows Server 2025 (Server Core installation)

✅ Remediation

KB5052000 (Security Update) — fixed build 10.0.17763.6893 KB5051979 (Security Update) — fixed build 10.0.20348.3207 KB5052106 (SecurityHotpatchUpdate) — fixed build 10.0.20348.3148 KB5051974 (Security Update) — fixed build 10.0.19044.5487 KB5051989 (Security Update) — fixed build 10.0.22621.4890 KB5051974 (Security Update) — fixed build 10.0.19045.5487 KB5051987 (Security Update) — fixed build 10.0.26100.3194 KB5052105 (SecurityHotpatchUpdate) — fixed build 10.0.26100.3107 KB5051989 (Security Update) — fixed build 10.0.22631.4890 KB5051980 (Security Update) — fixed build 10.0.25398.1425 KB5052040 (Security Update) — fixed build 10.0.10240.20915 KB5052006 (Security Update) — fixed build 10.0.14393.7785

🔗 References (19)