CVE-2021-43256

high Microsoft
CVSS v3 Base Score
7.8
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS Score
0.9%
Exploitation probability in 30 days
Top 23% most likely to be exploited
Attack Characteristics
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Published: December 15, 2021 (1668 days ago)
Last Modified: May 19, 2026
Vendor: Microsoft
Source: NVD

Description

Microsoft Excel Remote Code Execution Vulnerability

CWE

NVD-CWE-noinfo

Affected Products

microsoft 365 appsmicrosoft excelmicrosoft excel rtmicrosoft officemicrosoft office long term servicing channelmicrosoft office online servermicrosoft office web apps

References

🔗 portal.msrc.microsoft.com 🔗 portal.msrc.microsoft.com