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-2025-24991MediumActively exploited
Out-of-bounds read in Windows NTFS allows an authorized attacker to disclose information locally.
- CVE-2025-24984MediumActively exploited
A vulnerability in Windows NTFS involves insertion of sensitive information into a log file. An attacker with physical access can exploit this to disclose information.
- CVE-2026-96935Medium
Exposure of sensitive system information to an unauthorized control sphere in Windows NTFS allows an authorized attacker to disclose information locally.
- CVE-2026-96931High
Untrusted pointer dereference in Windows NTFS allows an authorized attacker to elevate privileges locally.
- CVE-2026-96928High
Out-of-bounds read in Windows NTFS allows an authorized attacker to elevate privileges locally.
- CVE-2026-96927Medium
Out-of-bounds read in Windows NTFS allows an authorized attacker to disclose information locally.
- CVE-2026-96925Medium
Integer underflow (wrap or wraparound) in Windows NTFS allows an authorized attacker to disclose information locally. The flaw results from improper handling of numeric values in the NTFS driver.
Original NVD description (English source)
Windows NTFS Elevation of Privilege Vulnerability
Vulnerability data from NVD (NIST) · CISA KEV · EPSS