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Multiple Microsoft Windows Vulnerabilities Exploit in the Wild

Severity

High

Analysis Summary

CVE-2025-21418 CVSS:7.8

Microsoft Windows could allow a local authenticated attacker to gain SYSTEM privileges when using a specially crafted application.

CVE-2025-21391 CVSS:7.1

Microsoft Windows could allow a local authenticated attacker to delete data that could include data that results in the service being unavailable.

Impact

  • Privilege Escalation

Indicators of Compromise

CVE

  • CVE-2025-21418

  • CVE-2025-21391

Affected Vendors

  • Microsoft

Affected Products

  • Microsoft Windows Server 2022
  • Microsoft Windows 10 Version 1809 - 10.0.17763.0
  • Microsoft Windows Server 2019 - 10.0.17763.0
  • Microsoft Windows Server 2019 (Server Core installation) - 10.0.17763.0
  • Microsoft Windows Server 2022 - 10.0.20348.0
  • Microsoft Windows 11 version 22H2 - 10.0.22621.0
  • Microsoft Windows 10 Version 22H2 - 10.0.19045.0
  • Microsoft Windows Server 2025 (Server Core installation) - 10.0.26100.0
  • Microsoft Windows 11 version 22H3 - 10.0.22631.0
  • Microsoft Windows 11 Version 23H2 - 10.0.22631.0
  • Microsoft Windows 11 Version 24H2 - 10.0.26100.0
  • Microsoft Windows Server 2016 - 10.0.14393.0
  • Microsoft Windows Server 2016 (Server Core installation) - 10.0.14393.0
  • Microsoft Windows 10 Version 21H2 - 10.0.19043.0
  • Microsoft Windows Server 2025 - 10.0.26100.0
  • Microsoft Windows 10 Version 1507 - 10.0.10240.0
  • Microsoft Windows 10 Version 1607 - 10.0.14393.0

Remediation

Use Microsoft Automatic Update to apply the appropriate patch for your system, or the Microsoft Security Update Guide to search for available patches.

CVE-2025-21418

CVE-2025-21391