Rewterz

Quasar RAT aka CinaRAT – Active IOCs

December 10, 2025
Rewterz

Multiple Microsoft Products Zero-Day Vulnerabilities

December 10, 2025

CVE-2025-62221 – Microsoft Windows Cloud Files Vulnerability Exploit in the Wild

Severity

High

Analysis Summary

CVE-2025-62221

Microsoft Windows allows an authorized attacker to elevate privileges locally, caused by a use-after-free in the Cloud Files Mini Filter Driver.

Impact

  • Privilege Escalation

Indicators of Compromise

CVE

  • CVE-2025-62221

Affected Vendors

  • Microsoft

Affected Products

  • Microsoft Windows Server 2019
  • Microsoft Windows 10 Version 1809 for 32-bit Systems
  • Microsoft Windows 10 Version 1809 for x64-based Systems
  • Microsoft Windows Server 2022
  • Microsoft Windows Server 2019 (Server Core installation)
  • Microsoft Windows Server 2022 (Server Core installation)
  • Microsoft Windows Server 2025
  • Microsoft Windows 11 Version 24H2 for x64-based Systems
  • Microsoft Windows 11 Version 24H2 for ARM64-based Systems
  • Microsoft Windows 11 Version 23H2 for x64-based Systems
  • Microsoft Windows 11 Version 23H2 for ARM64-based Systems
  • Microsoft Windows Server 2025 (Server Core installation)
  • Microsoft Windows 10 Version 22H2 for x64-based Systems
  • Microsoft Windows 10 Version 21H2 for x64-based Systems
  • Microsoft Windows 10 Version 22H2 for 32-bit Systems
  • Microsoft Windows 10 Version 22H2 for ARM64-based Systems
  • Microsoft Windows 10 Version 21H2 for ARM64-based Systems
  • Microsoft Windows 10 Version 21H2 for 32-bit Systems
  • Microsoft Windows Server 2022 - 23H2 Edition (Server Core installation)
  • Microsoft Windows 11 Version 25H2 for ARM64-based Systems
  • Microsoft Windows 11 Version 25H2 for x64-based Systems

Remediation

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

Microsoft Security Update Guide

Reading this advisory was a good start.

Make it a habit.

Rewterz publishes threat advisories ahead of mainstream cybersecurity media, informed by an AI-Native Autonomous SOC that sees regional threat actor activity in real time. Subscribe to receive each new advisory as it publishes, plus a monthly Middle East threat landscape brief drawn from our own SOC telemetry. For teams evaluating their detection coverage, a 30-minute consultation with a senior analyst is also available, at your pace, when you're ready.