Patch tracker / CVE reference / CVE-2025-62221
CVE-2025-62221
CVE-2025-62221 is a high severity Microsoft vulnerability with a CVSS score of 8.8. It is in the CISA Known Exploited Vulnerabilities catalog: attackers are using it in the wild, which makes it a fix-first item. Microsoft has shipped the fix: deploy one of the 8 updates below from the Microsoft Update Catalog, and see where this CVE sits against the rest on the patch tracker.
High severity Microsoft vulnerability, CVSS 8.8. Fixed by 8 Microsoft security updates.
Risk summary
Updated July 25, 2026. Data refreshed on every build from MSRC, CISA KEV, and FIRST EPSS.
Senserva AI Opinion for CVE-2025-62221
CVE-2025-62221 is a local elevation of privilege flaw in the Windows Cloud Files Mini Filter Driver, the kernel component behind OneDrive and other cloud placeholder sync. It carries Severity High with a CVSS score of 8.8, and CISA added it to the Known Exploited Vulnerabilities catalog on 2025-12-09, so confirmed exploitation matters more than the low 5 percent EPSS estimate. Affected builds include Windows 10 Version 1809 32-bit and Version 21H2 on both 32-bit and ARM64 systems, which are common on aging or specialized endpoints.
Do this: Deploy the Microsoft December 2025 patch for this driver to all Windows 10 1809 and 21H2 systems now, prioritizing the ARM64 and 32-bit endpoints that use cloud file sync.
AI-generated from public data, 2026-07-21. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2025-62221
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for CVE-2025-62221
Published and last-revised dates are authoritative, from Microsoft MSRC (or the CISA KEV date-added). Senserva additionally records day-to-day changes from 2026-07-07, refreshed several times a day; the change count reflects that forward-only tracking.
Exploitation and severity
Listed in the CISA Known Exploited Vulnerabilities catalog, confirmed exploited in the wild. EPSS exploit probability 4.7%. CVSS 8.8 (High).
This CVE is among the lower half of tracked Microsoft CVEs by EPSS exploit probability, and one of 3 actively-exploited CVEs in December 2025.
Official patch(es) for CVE-2025-62221
Treat as urgent: it is being exploited in the wild (CISA KEV), so patch ahead of items that are not. In Intune or Defender, confirm whether the fixing updates KB5071413, KB5071417, KB5071542, KB5071544, KB5071546, KB5071547, KB5072014, KB5072033 are installed across the affected products. Senserva does this automatically across your tenant and flags every missing patch.
Apply the Microsoft security updates below to fix CVE-2025-62221. Each KB page carries the Microsoft Update Catalog download, Microsoft's known issues for the update, a copy-paste PowerShell check for whether it is installed, and the Senserva AI read.
Affected products
Common questions about CVE-2025-62221
Is CVE-2025-62221 actively exploited?
Yes. CVE-2025-62221 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed. Its EPSS exploit probability is 4.7%.
What patch fixes CVE-2025-62221?
Microsoft fixed CVE-2025-62221 in KB5071413, KB5071417, KB5071542, KB5071544, KB5071546, KB5071547, KB5072014, KB5072033. Download from the Microsoft Update Catalog, or let Intune, Windows Update, or WSUS deliver it.
Which products are affected by CVE-2025-62221?
Windows 10 Version 1809 for 32-bit Systems, Windows 11 Version 25H2 for ARM64-based Systems, Windows 11 Version 25H2 for x64-based Systems.
Can I ask my own AI about CVE-2025-62221?
Yes. This page includes a free, ready-to-paste AI prompt containing CVE-2025-62221's key facts: severity, CVSS, EPSS exploit probability, CISA KEV status, and the fixing KB. Copy it into Claude, ChatGPT, or Copilot for a triage plan; the data is refreshed twice a day (5 AM and 3 PM US Central).
Fixed by the same updates
If you are patching CVE-2025-62221, the same updates also fix these:
Authoritative references
Want every Microsoft CVE and the patches that fix it, ranked by real-world risk? See the Microsoft Patch Tracker.
