CVE-2021-43905 - Vulnerability Details - OpenCVE

Description

Microsoft Office app Remote Code Execution Vulnerability

Published: 2021-12-15

Score: 9.6 Critical

EPSS: 2.8% Low

KEV: No

Impact:

Action:

Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Microsoft

Office app

affected

Version	Status	Constraints
`0`	affected	< publication

Configuration 1 [-]

cpe:2.3:a:microsoft:365_copilot:*:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

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Advisories

Source	ID	Title
EUVD	EUVD-2021-30767	Microsoft Office app Remote Code Execution Vulnerability

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction Required

No CVSS v3.0

Access Vector Network

Access Complexity Medium

Authentication None

Confidentiality Impact Partial

Integrity Impact Partial

Availability Impact Partial

This CVE is not in the KEV list.

The EPSS score is 0.02821.

Exploitation none

Automatable no

Technical Impact total

References

Link	Providers
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43905

History

Thu, 28 May 2026 19:30:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Wed, 11 Jun 2025 15:45:00 +0000

Type	Values Removed	Values Added
First Time appeared		Microsoft 365 Copilot
CPEs		cpe:2.3:a:microsoft:365_copilot::::::::
Vendors & Products		Microsoft 365 Copilot

Subscriptions

Microsoft 365 Copilot Office

MITRE

Status: PUBLISHED

Assigner: microsoft

Published: 2021-12-15T14:15:40.000Z

Updated: 2026-05-28T18:46:44.493Z

Reserved: 2021-11-16T00:00:00.000Z

Link: CVE-2021-43905

Vulnrichment

Updated: 2024-08-04T04:10:16.923Z

NVD

Status : Analyzed

Published: 2021-12-15T15:15:11.467

Modified: 2026-06-17T04:11:37.953

Link: CVE-2021-43905

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

NVD-CWE-noinfo

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