Description
Windows NTFS Elevation of Privilege Vulnerability
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Microsoft | Windows 10 Version 1809 | 10.0.0 – < 10.0.17763.1999 | 10.0.17763.1999 |
| Microsoft | Windows Server 2019 | 10.0.0 – < 10.0.17763.1999 | 10.0.17763.1999 |
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.0 – < 10.0.17763.1999 | 10.0.17763.1999 |
| Microsoft | Windows 10 Version 1909 | 10.0.0 – < 10.0.18363.1621 | 10.0.18363.1621 |
| Microsoft | Windows 10 Version 21H1 | 10.0.0 – < 10.0.19043.1052 | 10.0.19043.1052 |
| Microsoft | Windows 10 Version 2004 | 10.0.0 – < 10.0.19041.1052 | 10.0.19041.1052 |
| Microsoft | Windows Server version 2004 | 10.0.0 – < 10.0.19041.1052 | 10.0.19041.1052 |
| Microsoft | Windows 10 Version 20H2 | 10.0.0 – < 10.0.19042.1052 | 10.0.19042.1052 |
| Microsoft | Windows Server version 20H2 | 10.0.0 – < 10.0.19042.1052 | 10.0.19042.1052 |
| Microsoft | Windows 10 Version 1507 | 10.0.0 – < 10.0.10240.18967 | 10.0.10240.18967 |
| Microsoft | Windows 10 Version 1607 | 10.0.0 – < 10.0.14393.4467 | 10.0.14393.4467 |
| Microsoft | Windows Server 2016 | 10.0.0 – < 10.0.14393.4467 | 10.0.14393.4467 |
| Microsoft | Windows Server 2016 (Server Core installation) | 10.0.0 – < 10.0.14393.4467 | 10.0.14393.4467 |
| Microsoft | Windows 7 | 6.1.0 – < 6.1.7601.25632 | 6.1.7601.25632 |
| Microsoft | Windows 7 Service Pack 1 | 6.1.0 – < 6.1.7601.25632 | 6.1.7601.25632 |
| Microsoft | Windows 8.1 | 6.3.0 – < 6.3.9600.20045, 6.3.0 – < 6.3.9600.20044 | 6.3.9600.20045 |
| Microsoft | Windows Server 2008 Service Pack 2 | 6.0.0 – < 6.0.6003.21137 | 6.0.6003.21137 |
| Microsoft | Windows Server 2008 Service Pack 2 (Server Core installation) | 6.0.0 – < 6.0.6003.21137 | 6.0.6003.21137 |
| Microsoft | Windows Server 2008 Service Pack 2 | 6.0.0 – < 6.0.6003.21137 | 6.0.6003.21137 |
| Microsoft | Windows Server 2008 R2 Service Pack 1 | 6.1.0 – < 6.1.7601.25632 | 6.1.7601.25632 |
| Microsoft | Windows Server 2008 R2 Service Pack 1 (Server Core installation) | 6.0.0 – < 6.1.7601.25632 | 6.1.7601.25632 |
| Microsoft | Windows Server 2012 | 6.2.0 – < 6.2.9200.23372 | 6.2.9200.23372 |
| Microsoft | Windows Server 2012 (Server Core installation) | 6.2.0 – < 6.2.9200.23372 | 6.2.9200.23372 |
| Microsoft | Windows Server 2012 R2 | 6.3.0 – < 6.3.9600.20045, 6.3.0 – < 6.3.9600.20044 | 6.3.9600.20045 |
| Microsoft | Windows Server 2012 R2 (Server Core installation) | 6.3.0 – < 6.3.9600.20045, 6.3.0 – < 6.3.9600.20044 | 6.3.9600.20045 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 6 repositories
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aazhuliang/CVE-2021-31956-EXP ★ 39 · Jan 11, 2022
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Y3A/CVE-2021-31956 ★ 6 · Sep 2, 2022
Win10 20H2 LPE for CVE-2021-31956
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hoangprod/CVE-2021-31956-POC ★ 4 · Jun 5, 2023
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deletehead/Pool-Overflow-CVE-2021-31956 ★ 0 · Jun 17, 2025
Kernel Pool Overflow Exploit targeting CVE-2021-31956
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DaoshuReal/UAC-Elevation-CVE ★ 0 · May 7, 2025
fodhelper-based UAC bypass poc for CVE-2021-31956, registry keys to SYSTEM without a prompt. educational
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hzshang/CVE-2021-31956 ★ 0 · Nov 22, 2021
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.