#VU53912 Use-after-free in Microsoft products - CVE-2021-31939
Published: June 8, 2021 / Updated: June 22, 2021
Vulnerability identifier: #VU53912
Vulnerability risk: High
CVSSv4.0: 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/E:P/U:Amber
CVE-ID: CVE-2021-31939
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vulnerable software:
Office Online Server
Microsoft Office
Microsoft Excel
Microsoft Office Web Apps Server
Office Online Server
Microsoft Office
Microsoft Excel
Microsoft Office Web Apps Server
Software vendor:
Microsoft
Microsoft
Description
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a use-after-free error when processing Excel files. A remote attacker can create a specially crafted Excel file, trick the victim into opening it, trigger a use-after-free error and execute arbitrary code on the system.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
Remediation
Install updates from vendor's website.