Junglewise Threat Intelligence

CVE-2021-31956: Microsoft Windows NTFS Privilege Escalation Vulnerability

CVE-2021-31956 · Severity: critical · CVSS 7.8 · Exploited in the wild · Published 2021-11-03

Technologies: Microsoft Windows 8.1, Microsoft Windows, Microsoft Windows Server, Microsoft Windows 7, Microsoft Windows 10, Microsoft Windows Rt 8.1. Vendors: Microsoft.

Executive brief

Microsoft Windows NTFS contains an integer underflow vulnerability (CWE-191) that allows for local elevation of privilege. An attacker with low privileges can exploit this via a specially crafted application to gain high-level system access.

Affected products

  • Microsoft Windows 10 1507, 1607, 1809, 1909, 2004, 20H2, 21H1
  • Microsoft Windows Server 2008, 2012, 2016, 2019, 2004, 20H2
  • Microsoft Windows 7 SP1
  • Microsoft Windows 8.1 -
  • Microsoft Windows RT 8.1 -

Timeline

  • 2021-11-03: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
  • 2021-11-03: disclosed

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