Is CVE-2025-64661 in the CISA KEV catalog?

No. CVE-2025-64661 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-64661?

CVE-2025-64661 has a CVSS v3 base score of 7.8 (Important).

What is the EPSS score for CVE-2025-64661?

CVE-2025-64661 has an EPSS score of 0.23% (14th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-64661?

Install KB5071543 for Windows 10 Version 1607. Fixes are available for 16 affected products.

CVE & CISA-KEV Catalog

CVE-2025-64661

HIGH

7.8

CVSS v3

NVD

Description

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Shell allows an authorized attacker to elevate privileges locally.

CWE-362Race Condition

How to fix

Remediation Available

Windows 10 Version 1607Windows

Install:KB5071543Microsoft

Windows 10 Version 1809Windows

Install:KB5071544Microsoft

Windows 10 Version 21H2Windows

Install:KB5071546Microsoft

Windows 10 Version 22H2Windows

Install:KB5071546Microsoft

Windows 11 Version 23H2Windows

Install:KB5071417Microsoft

Windows 11 Version 24H2Windows

Install:KB5072033Microsoft

Install:KB5072014Microsoft

Windows 11 Version 25H2Windows

Install:KB5072033Microsoft

Install:KB5072014Microsoft

Windows Server 2016Windows

Install:KB5071543Microsoft

Windows Server 2016 (Server Core installation)Windows

Install:KB5071543Microsoft

Windows Server 2019Windows

Install:KB5071544Microsoft

Windows Server 2019 (Server Core installation)Windows

Install:KB5071544Microsoft

Windows Server 2022Windows

Install:KB5071413Microsoft

Install:KB5071547Microsoft

Windows Server 2022 (Server Core installation)Windows

Install:KB5071413Microsoft

Install:KB5071547Microsoft

Windows Server 2022, 23H2 Edition (Server Core installation)Windows

Install:KB5071542Microsoft

Windows Server 2025Windows

Install:KB5072033Microsoft

Install:KB5072014Microsoft

Windows Server 2025 (Server Core installation)Windows

Install:KB5072033Microsoft

Install:KB5072014Microsoft

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityHigh

Privileges RequiredLow

User InteractionNone

ScopeChanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C

Exploit Intelligence

0.23%probability of exploitation in 30 days

14thpercentile

Low risk: more likely to be exploited than 14% of all known CVEs.

References

Vendor Advisory1

msrc.microsoft.com

Related Vulnerabilities

Other CWE-362 (Race Condition) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-6387	High	8.1	100%	-	Fix
CVE-2023-36884	High	7.5	99%	KEV + Ransom	Fix
CVE-2018-15473	Medium	5.3	99%	-	Fix
CVE-2024-27983	High	8.2	87%	-	Fix
CVE-2014-0226	Medium	6.8	86%	-	Fix
CVE-2016-5195	High	7.0	84%	KEV	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-12-10.