CVE-2021-31956
Windows NTFS Elevation of Privilege Vulnerability
- Published
- Jun 8, 2021
- Updated
- Jan 12, 2026
- Assigning CNA
- microsoft
- Evidence observed
- Nov 3, 2021
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HModerate · next 30 days
- Percentile
- 97.7%
- Model date
- Oct 17, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
CISA Known Exploited
This CVE appears in the CISA Known Exploited Vulnerabilities catalog.
Summary
Windows NTFS Elevation of Privilege Vulnerability
Sources
Proof-of-concept exploit for CVE-2021-31956, a Windows kernel NTFS elevation-of-privilege vulnerability. Demonstrates exploitation techniques including WNF abuse and token stealing for privilege escalation.
- CVE-2021-31956-EXPExploit
Exploit for CVE-2021-31956, a Windows kernel privilege escalation vulnerability, targeting Windows 10 1903. Provides a proof-of-concept implementation for local privilege escalation.
fodhelper-based UAC bypass poc for CVE-2021-31956, registry keys to SYSTEM without a prompt. educational
Kernel pool overflow exploit for CVE-2021-31956 targeting Windows kernel driver vulnerabilities. Provides proof-of-concept code for privilege escalation via heap-based buffer overflow.
- CVE-2021-31956Exploit
Win10 20H2 LPE for CVE-2021-31956
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