CVE-2021-43240

—1

CVSS 3.1

7.8 high

EPSS

<1%p45

Published

Dec 15, 2021 (Dec 15, 2021)

Modified

Jun 17, 2026

Description

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 news3 stories

Microsoft December 2021 Patch Tuesday fixes an actively exploited zero

Security AffairsDec 15, 15:08 UTC · Dec 15, 2021Vulnerability in the wildCVE-2021-43890 CVE-2021-43240 CVE-2021-41333+54 CVEs

60

Log4j Looms Large Over Patch Tuesday

Infosecurity MagazineDec 15, 09:00 UTC · Dec 15, 2021Vulnerability in the wildCVE-2021-43890 CVE-2021-43893 CVE-2021-43883+4 CVEs

60

Microsoft Issues Windows Update to Patch 0

The Hacker NewsDec 15, 00:00 UTC · Dec 15, 2021Vulnerability in the wildCVE-2021-43890 CVE-2021-43240 CVE-2021-43883+10 CVEs

60