CVE-2025-64661
published 2025-12-09CVE-2025-64661: Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Shell allows an authorized attacker to elevate…
PriorityP345high7.8CVSS 3.1
AVLACHPRLUINSCCHIHAH
EPSS
0.24%
15.1th percentile
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Shell allows an authorized attacker to elevate privileges locally.
Affected
36 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | windows_10_1607 | < 10.0.14393.8688 | 10.0.14393.8688 |
| microsoft | windows_10_1809 | < 10.0.17763.8146 | 10.0.17763.8146 |
| microsoft | windows_10_21h2 | < 10.0.19044.6691 | 10.0.19044.6691 |
| microsoft | windows_10_22h2 | < 10.0.19045.6691 | 10.0.19045.6691 |
| microsoft | windows_10_version_1607 | >= 10.0.14393.0 < 10.0.14393.8688 | 10.0.14393.8688 |
| microsoft | windows_10_version_1809 | >= 10.0.17763.0 < 10.0.17763.8146 | 10.0.17763.8146 |
| microsoft | windows_10_version_21h2 | >= 10.0.19044.0 < 10.0.19044.6691 | 10.0.19044.6691 |
| microsoft | windows_10_version_22h2 | >= 10.0.19045.0 < 10.0.19045.6691 | 10.0.19045.6691 |
| microsoft | windows_11_23h2 | < 10.0.22631.6345 | 10.0.22631.6345 |
| microsoft | windows_11_24h2 | < 10.0.26100.7392 | 10.0.26100.7392 |
| microsoft | windows_11_25h2 | < 10.0.26200.7392 | 10.0.26200.7392 |
| microsoft | windows_11_version_22h3 | >= 10.0.22631.0 < 10.0.22631.6345 | 10.0.22631.6345 |
| microsoft | windows_11_version_23h2 | >= 10.0.22631.0 < 10.0.22631.6345 | 10.0.22631.6345 |
| microsoft | windows_11_version_24h2 | >= 10.0.26100.0 < 10.0.26100.7462 | 10.0.26100.7462 |
| microsoft | windows_11_version_25h2 | >= 10.0.26200.0 < 10.0.26200.7462 | 10.0.26200.7462 |
| microsoft | windows_server_2016 | < 10.0.14393.8688 | 10.0.14393.8688 |
| microsoft | windows_server_2016 | >= 10.0.14393.0 < 10.0.14393.8688 | 10.0.14393.8688 |
| microsoft | windows_server_2019 | < 10.0.17763.8146 | 10.0.17763.8146 |
| microsoft | windows_server_2019 | >= 10.0.17763.0 < 10.0.17763.8146 | 10.0.17763.8146 |
| microsoft | windows_server_2022 | < 10.0.20348.4467 | 10.0.20348.4467 |
| microsoft | windows_server_2022 | >= 10.0.20348.0 < 10.0.20348.4529 | 10.0.20348.4529 |
| microsoft | windows_server_2022_23h2 | < 10.0.25398.2025 | 10.0.25398.2025 |
| microsoft | windows_server_2025 | < 10.0.26100.7392 | 10.0.26100.7392 |
| microsoft | windows_server_2025 | >= 10.0.26100.0 < 10.0.26100.7462 | 10.0.26100.7462 |
| msrc | windows_10_version_1607 | — | — |
CVSS provenance
nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
vendor_msrc7.8HIGH
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Microsoft
Windows Shell Elevation of Privilege Vulnerability
vendor_msrc·2025-12-09·CVSS 7.8
CVE-2025-64661 [HIGH] CWE-362 Windows Shell Elevation of Privilege Vulnerability
Windows Shell Elevation of Privilege Vulnerability
Description: Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Shell allows an authorized attacker to elevate privileges locally.
FAQ: According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?
Successful exploitation of this vulnerability requires an attacker to win a race condition.
FAQ: According to the CVSS metric, a successful exploitation could lead to a scope change (S:C). What does this mean for this vulnerability?
This vulnerability could lead to a contained execution environment escape. Please refer to AppContainer Isolation for more information.
FAQ: What privileges could be gained by an attacker who successfully exploit
GHSA
GHSA-9qjg-wx3m-w8j2: Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Shell allows an authorized attacker to elevate
ghsa_unreviewed·2025-12-09
CVE-2025-64661 [HIGH] CWE-362 GHSA-9qjg-wx3m-w8j2: Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Shell allows an authorized attacker to elevate
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Shell allows an authorized attacker to elevate privileges locally.
No detection rules found.
No public exploits indexed.
Bleepingcomputer
Microsoft December 2025 Patch Tuesday fixes 3 zero-days, 57 flaws
blogs_bleepingcomputer·2025-12-09·CVSS 7.8
[HIGH] Microsoft December 2025 Patch Tuesday fixes 3 zero-days, 57 flaws
## Microsoft December 2025 Patch Tuesday fixes 3 zero-days, 57 flaws
## Lawrence Abrams
28 Elevation of Privilege Vulnerabilities
19 Remote Code Execution Vulnerabilities
4 Information Disclosure Vulnerabilities
3 Denial of Service Vulnerabilities
2 Spoofing Vulnerabilities
When BleepingComputer reports on Patch Tuesday security updates, we only count those released by Microsoft today. Therefore, the number of flaws does not include Microsoft Edge (15 flaws) and Mariner vulnerabilities fixed earlier this month.
To learn more about the non-security updates released today, you can review our dedicated articles on the Windows 11 KB5072033 & KB5071417 cumulative updates .
If you're facing delays, blind spots, or prioritization issues with Patch Tuesday updates, our recent webinar with
Wiz
CVE-2025-64661 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz·CVSS 7.8
CVE-2025-64661 [HIGH] CVE-2025-64661 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2025-64661 :
vulnerability analysis and mitigation
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Shell allows an authorized attacker to elevate privileges locally.
Source : NVD
## 7.8
Score
Published December 9, 2025
Severity HIGH
CNA Score 7.8
Has Public Exploit No
Has CISA KEV Exploit No
CISA KEV Release Date N/A
CISA KEV Due Date N/A
Exploitation Probability Percentile (EPSS) 14.4
Exploitation Probability (EPSS) N/A
Sources
NVD
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2025-12-09
Published