NewA calmer, faster ZeroHour — security assessments on articles, story timelines and search from any page.

CVE-2021-43240

CVSS 3.1: 7.8 high
EPSS: <1%p45
Published: Dec 15, 2021 · Dec 15, 2021
Modified: Jun 17, 2026

Analyze CVE-2021-43240 with Vani AIImpact, affected versions, exploitation status, mitigations and detection

Description · NVD

NTFS Set Short Name Elevation of Privilege Vulnerability

Vendors: microsoft

Products: windows 10, windows 11, windows server, windows server 2016

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (0.6%)

In the news

3 stories

Microsoft December 2021 Patch Tuesday fixes an actively exploited zero

Security AffairsDec 15, 15:08 UTC · Dec 15, 2021VulnerabilityExploitedCVE-2021-43890 CVE-2021-43240 CVE-2021-41333+541 · 1 read

60

Log4j Looms Large Over Patch Tuesday

Infosecurity MagazineDec 15, 09:00 UTC · Dec 15, 2021VulnerabilityExploitedCVE-2021-43890 CVE-2021-43893 CVE-2021-43883+42 · 1 read

60

Microsoft Issues Windows Update to Patch 0

The Hacker NewsDec 15, 00:00 UTC · Dec 15, 2021VulnerabilityExploitedCVE-2021-43890 CVE-2021-43240 CVE-2021-43883+102 · 1 read

60