CVE-2021-28454

HIGH

Microsoft 365 Apps - Remote Code Execution via Use-After-Free

Title source: llm

Microsoft Excel Remote Code Execution Vulnerability

Core 2

Core References

Patch, Vendor Advisory x_refsource_misc

Third Party Advisory, VDB Entry x_refsource_misc

CVSS v3 7.8

EPSS 0.0314

EPSS Percentile 86.3%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE

CWE-416

Status published

Products (7)

microsoft/365_apps

microsoft/office 2010 sp2

microsoft/office 2013 sp1 (2 CPE variants)

microsoft/office 2016

microsoft/office 2019

microsoft/office_online_server

microsoft/office_web_apps_server 2013 sp1

Published Apr 13, 2021

Tracked Since Feb 18, 2026