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CVE-2021-43905

CVSS 3.1: 9.6 critical
EPSS: 3%p86
Published: Dec 15, 2021 · Dec 15, 2021
Modified: Jun 17, 2026

Analyze CVE-2021-43905 with Vani AIImpact, affected versions, exploitation status, mitigations and detection

Description · NVD

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 news

4 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

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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

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Microsoft Patch Tuesday, December 2021 Edition

Krebs on SecurityDec 15, 00:00 UTC · Dec 15, 2021VulnerabilityExploitedCVE-2021-43890 CVE-2021-43905 CVE-2021-43883+11

60

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

Help Net SecurityDec 14, 00:00 UTC · Dec 14, 2021VulnerabilityExploitedCVE-2021-43890 CVE-2021-43905 CVE-2021-43215+24 · 1 read

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