Actively exploited · Published Jun 8, 2021 · Assigned by microsoft
CVE-2021-31956Windows NTFS Elevation of Privilege Vulnerability
High 7.8 Exploited
In plain English
A high-severity security flaw in Windows 10 Version 1507 from Microsoft. Attackers are actively exploiting it in the wild (listed by CISA on November 3, 2021). The chance it is exploited in the next 30 days is estimated at 22.3% (higher than 98% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Apply updates per vendor instructions.
Severity (CVSS 3.1)7.8High
Exploit odds (30 days)22.3%top 2.3% of all CVEs
Exploited in the wildYesCISA KEV since Nov 3, 2021
Attack tooling1Public PoC
CISA guidance
Apply updates per vendor instructions.
Federal agencies must remediate by Nov 17, 2021.
Official description
Windows NTFS Elevation of Privilege Vulnerability
Affected products (as reported)
Weakness: CWE-191 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C