Elevation of Privilege Vulnerability in Windows Cloud Files Mini Filter Driver
CVE-2025-62221

7.8HIGH

Key Information:

Vendor

Microsoft
Status
Windows 10 Version 1809
Windows 10 Version 21h2
Windows 10 Version 22h2
Windows Server 2025 (server Core Installation)
Vendor
CVE Published:
9 December 2025

Badges

👾 Exploit Exists🦅 CISA Reported📰 News Worthy

What is CVE-2025-62221?

A use after free vulnerability in the Windows Cloud Files Mini Filter Driver can allow an authorized attacker to execute local privilege escalation. By exploiting this flaw, attackers may gain elevated privileges, potentially compromising system integrity. It is crucial for users to be aware of this risk and apply the necessary security patches provided by Microsoft to safeguard their systems.

CISA has reported CVE-2025-62221

CISA provides regional cyber and physical services to support security and resilience across the United States. CISA monitor the most dangerious vulnerabilities and have identifed CVE-2025-62221 as being exploited but is not known by the CISA to be used in ransomware campaigns. This is subject to change at pace

The CISA's recommendation is: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Affected Version(s)

Windows 10 Version 1809 32-bit Systems 10.0.17763.0 < 10.0.17763.8146

Windows 10 Version 21H2 32-bit Systems 10.0.19044.0 < 10.0.19044.6691

Windows 10 Version 22H2 ARM64-based Systems 10.0.19045.0 < 10.0.19045.6691

News Articles

favicon imagetheregister.com

Patch Tuesday: Microsoft EoP, NotePad++, Ivanti, Fortinet

Happy December Patch Tuesday to all who celebrate. This month's patch party includes one Microsoft flaw under exploitation, plus two others listed as publicly known – but just 57 CVEs in total from...

13 hours ago

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisory

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • 👾

    Exploit known to exist

  • 🦅

    CISA Reported

  • 📰

    First article discovered by theregister.com

  • Vulnerability published

  • Vulnerability Reserved

JSON
.
CVE-2025-62221 : Elevation of Privilege Vulnerability in Windows Cloud Files Mini Filter Driver