Code Injection in Windows and Windows Server - CVE-2021-26443
Published: November 9, 2021
Vulnerability identifier: #VU58060
CSH Severity: Low
CVSSv4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-26443
CWE-ID: CWE-94
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerable software:
Windows
Windows Server
Windows
Windows Server
Software vendor:
Microsoft
Microsoft
Description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to improper input validation in Microsoft Virtual Machine Bus (VMBus). A remote authenticated attacker on the local network can send a specially crafted communication on the VMBus channel and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Remediation
Install updates from vendor's website.