CVE-2021-43905

—

CVSS 3.1

9.6 critical

EPSS

3%p86

Published

Dec 15, 2021 (Dec 15, 2021)

Modified

Jun 17, 2026

Description

Microsoft Office app Remote Code Execution Vulnerability

Vendors: microsoft
Products: 365 copilot
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (2.8%)

In the news4 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

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

Microsoft Patch Tuesday, December 2021 Edition

Krebs on SecurityDec 15, 00:00 UTC · Dec 15, 2021Vulnerability in the wildCVE-2021-43890 CVE-2021-43905 CVE-2021-43883+1 CVEs

60

Microsoft patches spoofing vulnerability exploited by Emotet (CVE-2021-43890)

Help Net SecurityDec 14, 00:00 UTC · Dec 14, 2021Vulnerability in the wildCVE-2021-43890 CVE-2021-43905 CVE-2021-43215+2 CVEs

60