Use-after-free in Windows and Windows Server - CVE-2021-31166
Published: May 11, 2021 / Updated: October 25, 2024
Vulnerability identifier: #VU53113
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Amber
CVE-ID: CVE-2021-31166
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
The vulnerability is being exploited in the wild
Vendor: Microsoft
Affected software:
Windows
Windows Server
Windows
Windows Server
Detailed vulnerability description
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a use-after-free error in HTTP Protocol Stack. A remote attacker can send a specially crafted HTTP request to the affected system and execute arbitrary code.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
How to mitigate CVE-2021-31166
Install updates from vendor's website.