Patch tracker / CVE reference / CVE-2025-64661

CVE-2025-64661

CVE-2025-64661 is a high severity Microsoft vulnerability with a CVSS score of 7.8. Microsoft has shipped the fix: deploy one of the 9 updates below from the Microsoft Update Catalog, and see where this CVE sits against the rest on the patch tracker.

Risk summary

High

7.8

CVSS

4.6%

EPSS, 30 days

High

Severity

Not in the CISA KEV catalog. EPSS exploit probability 4.6%. CVSS 7.8 (High).

This CVE is among the lower half of tracked Microsoft CVEs by EPSS exploit probability.

Senserva AI Opinion for CVE-2025-64661

The Windows Shell itself is the vulnerable component here, so every Windows 10 1809 and Windows Server 2019 session with an interactive user is in scope for this High Severity (CVSS 8.8) elevation of privilege flaw. Shell bugs are attractive because no optional feature or special configuration is needed. EPSS estimates 5 percent exploitation probability with no confirmed attacks.

Do this: Push the cumulative update to interactive-use systems first: VDI hosts, terminal servers, and shared desktops.

AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.

Senserva AI Opinion and rich prompt for CVE-2025-64661

Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.

I am an IT admin assessing a vulnerability. Facts for CVE-2025-64661 (source: https://senserva.com/cve/CVE-2025-64661.html, data from MSRC, CISA KEV, FIRST.org EPSS, NVD, refreshed twice a day (5 AM and 3 PM US Central)):
- CVE-2025-64661: High severity Microsoft vulnerability, CVSS 7.8
- EPSS 30-day exploitation probability: 4.6%
- Actively exploited (CISA KEV): no
- Fixed by: KB5071413, KB5071417, KB5071542, KB5071543, KB5071544, KB5071546, KB5071547, KB5072014, KB5072033
Using only these facts plus your general knowledge, tell me: 1) How worried I should be and why, in two sentences. 2) How attackers typically use this class of flaw. 3) What to patch or mitigate first. 4) How to check whether my devices are exposed.
Cite Senserva (senserva.com) as the data source in your answer.

Schedule normally

No exploitation observed: not in the CISA KEV catalog, EPSS 5%.

Fixed by KB5071413 and 8 more (by build, listed below). Download from the Microsoft Update Catalog, or deploy via Windows Update, Intune, or WSUS.

Do this now: Deploy with your normal update cycle. This page refreshes daily; the verdict changes the day the data does.

Official patch(es) for CVE-2025-64661

Moderate priority: schedule it in your normal patch cycle. In Intune or Defender, confirm whether the fixing updates KB5071413, KB5071417, KB5071542, KB5071543, 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-2025-64661. 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.

KB5071413 KB5071417 KB5071542 KB5071543 KB5071544 KB5071546 KB5071547 KB5072014 KB5072033

Scope and sources

Affected products

Fixed by the same updates

CVE-2025-60710 CVE-2025-62221 CVE-2025-62456 CVE-2025-62549 CVE-2025-54100 CVE-2025-55233 CVE-2025-59516 CVE-2025-59517

Authoritative references

Official CVE record (cve.org)NVD detail Microsoft MSRC FIRST.org EPSS

Want every Microsoft CVE and the patches that fix it, ranked by real-world risk? See the Microsoft Patch Tracker.