CVE-2021-43905

Microsoft Office app Remote Code Execution Vulnerability

CVSS v3 9.6 CRITICAL
CVSS v2.0 6.8 MEDIUM

9.6^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 2.8 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

6.8^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:M/Au:N/C:P/I:P/A:P

Exploitability : 8.6 / Impact : 6.4

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43905	Patch Vendor Advisory
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43905	Patch Vendor Advisory

Configurations

Configuration 1 (hide)

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

History

11 Jun 2025, 15:27

Type	Values Removed	Values Added
First Time		Microsoft 365 Copilot
CPE	cpe:2.3:a:microsoft:office::::::::	cpe:2.3:a:microsoft:365_copilot::::::::

21 Nov 2024, 06:30

Type	Values Removed	Values Added
References	~~() https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43905 - Patch, Vendor Advisory~~	() https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43905 - Patch, Vendor Advisory

23 Dec 2021, 17:22

Type	Values Removed	Values Added
CPE		cpe:2.3:a:microsoft:office::::::::
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : 6.8 v3 : 9.6
CWE		NVD-CWE-noinfo
References	~~(MISC) https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43905 -~~	(MISC) https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43905 - Patch, Vendor Advisory

15 Dec 2021, 15:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2021-12-15 15:15

Updated : 2025-06-11 15:27

NVD link : CVE-2021-43905

Mitre link : CVE-2021-43905

CVE.ORG link : CVE-2021-43905

JSON object : View

Products Affected

microsoft

365_copilot

CWE

NVD-CWE-noinfo

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