Code Injection in Microsoft products - CVE-2021-43256
Published: December 14, 2021
Vulnerability identifier: #VU58907
CSH Severity: High
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-43256
CWE-ID: CWE-94
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to improper input validation in Microsoft Excel. A remote attacker can execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
Microsoft Excel
Microsoft Office
Microsoft Office Web Apps Server
Office Online Server
Microsoft Office
Microsoft Office Web Apps Server
Office Online Server
How to mitigate CVE-2021-43256
Install updates from vendor's website.