Actively exploited in the wild
Microsoft Windows NTFS Privilege Escalation Vulnerability
Microsoft - Windows · Listed in the CISA KEV since 2021-11-03. This indicates confirmed attacks in production environments.
Required action: Apply updates per vendor instructions.
CVE-2021-31956
HighCVSS 7.8KEVSummary
Windows NTFS Elevation of Privilege Vulnerability. Technical details are not provided in the description.
Risk Assessment
A local attacker may elevate their privileges on the system, potentially leading to full control of the device.
Recommendation
Apply Microsoft security updates for the NTFS file system and keep Windows systems up to date.
Other vulnerabilities in Windows NTFS
See all- CVE-2026-69463Critical
Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code over a network.
- CVE-2026-20840High
A heap-based buffer overflow in Windows NTFS allows an authorized attacker to execute code locally.
- CVE-2025-24993HighActively exploited
Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code locally.
- CVE-2026-83995High
Heap-based buffer overflow in Windows NTFS allows an authorized attacker to elevate privileges locally.
- CVE-2026-77503High
An out-of-bounds read in Windows NTFS allows an unauthorized attacker to elevate privileges locally.
- CVE-2026-72935Medium
Out-of-bounds read in Windows NTFS allows an authorized attacker to elevate privileges locally.
- CVE-2026-71329Medium
Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code via a physical attack.
- CVE-2026-69875High
A heap-based buffer overflow in Windows NTFS allows an authorized attacker to elevate privileges over a network.
- CVE-2026-69709High
Heap-based buffer overflow in Windows NTFS allows an authorized attacker to execute code locally.
- CVE-2026-69638High
Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code locally.
Original NVD description (English source)
Windows NTFS Elevation of Privilege Vulnerability