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CVE-2025-21420— Windows Disk Cleanup Tool Elevation of Privilege Vulnerability

Quick assessment

Affected
Microsoft Windows 10 Version 1507
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Microsoft Windows是美国微软（Microsoft）公司的一套个人设备使用的操作系统。 Microsoft Windows存在后置链接漏洞。攻击者利用该漏洞可以提升权限。以下产品和版本受到影响：Windows Server 2022 (Server Core installation),Windows Server 2022,Windows Server 2019 (Server Core installation),Windows 10 Version 21H2 for x64-based

CVSS 7.8 · High EPSS 3.63% · P89

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2025-21420

Vulnerability Information
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Vulnerability Title
Windows Disk Cleanup Tool Elevation of Privilege Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Windows Disk Cleanup Tool Elevation of Privilege Vulnerability
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
在文件访问前对链接解析不恰当(链接跟随)
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft Windows 后置链接漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Windows是美国微软（Microsoft）公司的一套个人设备使用的操作系统。 Microsoft Windows存在后置链接漏洞。攻击者利用该漏洞可以提升权限。以下产品和版本受到影响：Windows Server 2022 (Server Core installation),Windows Server 2022,Windows Server 2019 (Server Core installation),Windows 10 Version 21H2 for x64-based
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Microsoft Windows 10 Version 1507 10.0.10240.0 ~ 10.0.10240.20915 -
Microsoft Windows 10 Version 1607 10.0.14393.0 ~ 10.0.14393.7785 -
Microsoft Windows 10 Version 1809 10.0.17763.0 ~ 10.0.17763.6893 -
Microsoft Windows 10 Version 21H2 10.0.19044.0 ~ 10.0.19044.5487 -
Microsoft Windows 10 Version 22H2 10.0.19045.0 ~ 10.0.19045.5487 -
Microsoft Windows 11 version 22H2 10.0.22621.0 ~ 10.0.22621.4890 -
Microsoft Windows 11 version 22H3 10.0.22631.0 ~ 10.0.22631.4890 -
Microsoft Windows 11 Version 23H2 10.0.22631.0 ~ 10.0.22631.4890 -
Microsoft Windows 11 Version 24H2 10.0.26100.0 ~ 10.0.26100.3194 -
Microsoft Windows Server 2012 6.2.9200.0 ~ 6.2.9200.25317 -
Microsoft Windows Server 2012 (Server Core installation) 6.2.9200.0 ~ 6.2.9200.25317 -
Microsoft Windows Server 2012 R2 6.3.9600.0 ~ 6.3.9600.22417 -
Microsoft Windows Server 2012 R2 (Server Core installation) 6.3.9600.0 ~ 6.3.9600.22417 -
Microsoft Windows Server 2016 10.0.14393.0 ~ 10.0.14393.7785 -
Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.0 ~ 10.0.14393.7785 -
Microsoft Windows Server 2019 10.0.17763.0 ~ 10.0.17763.6893 -
Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.0 ~ 10.0.17763.6893 -
Microsoft Windows Server 2022 10.0.20348.0 ~ 10.0.20348.3207 -
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.0 ~ 10.0.25398.1425 -
Microsoft Windows Server 2025 10.0.26100.0 ~ 10.0.26100.3194 -
Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.0 ~ 10.0.26100.3194 -

II. Public POCs for CVE-2025-21420

# POC Description Source Link Shenlong Link
1 We found a way to DLL sideload with cleanmgr.exe https://github.com/Network-Sec/CVE-2025-21420-PoC POC Details
2 Exploiting a vulnerability in Windows Disk Cleanup to elevate privileges and provide access to protected data in Edge by bypassing the security feature. CVE-2025-21420 and CVE-2025-21401. https://github.com/toxy4ny/edge-maradeur POC Details
3 Proof of Concept CVE-2025-21420 (Windows Disk Cleanup Tool EoP) https://github.com/moiz-2x/CVE-2025-21420_POC POC Details
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III. Intelligence Information for CVE-2025-21420

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Vendor Advisories for CVE-2025-21420 (1)

Same Patch Batch · Microsoft · 2025-02-11 · 55 CVEs total

CVE-2025-21198 9.0 CRITICAL Microsoft High Performance Compute (HPC) Pack Remote Code Execution Vulnerability
CVE-2025-21406 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21208 8.8 HIGH Windows Routing and Remote Access Service (RRAS) Remote Code Execution Vulnerability
CVE-2025-21410 8.8 HIGH Windows Routing and Remote Access Service (RRAS) Remote Code Execution Vulnerability
CVE-2025-21368 8.8 HIGH Microsoft Digest Authentication Remote Code Execution Vulnerability
CVE-2025-21369 8.8 HIGH Microsoft Digest Authentication Remote Code Execution Vulnerability
CVE-2025-21371 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21407 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21200 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21190 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21201 8.8 HIGH Windows Telephony Server Remote Code Execution Vulnerability
CVE-2025-21376 8.1 HIGH Windows Lightweight Directory Access Protocol (LDAP) Remote Code Execution Vulnerability
CVE-2025-21400 8.0 HIGH Microsoft SharePoint Server Remote Code Execution Vulnerability
CVE-2025-21387 7.8 HIGH Microsoft Excel Remote Code Execution Vulnerability
CVE-2025-21358 7.8 HIGH Windows Core Messaging Elevation of Privileges Vulnerability
CVE-2025-21367 7.8 HIGH Windows Win32 Kernel Subsystem Elevation of Privilege Vulnerability
CVE-2025-21359 7.8 HIGH Windows Kernel Security Feature Bypass Vulnerability
CVE-2025-21392 7.8 HIGH Microsoft Office Remote Code Execution Vulnerability
CVE-2025-21386 7.8 HIGH Microsoft Excel Remote Code Execution Vulnerability
CVE-2025-21381 7.8 HIGH Microsoft Excel Remote Code Execution Vulnerability

Showing top 20 of 55 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Windows 10 Version 1507
Same vendor: Microsoft
Same weakness: CWE-59

V. Comments for CVE-2025-21420

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