CVE-2021-26443 — CRITICAL (9.0)

Vulnerability Description

Microsoft Virtual Machine Bus (VMBus) Remote Code Execution Vulnerability

CVSS Score

9.0

CRITICAL

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

Attack Vector

ADJACENT_NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Microsoft	Windows 10	20h2
Microsoft	Windows 11	-
Microsoft	Windows Server 2016	20h2
Microsoft	Windows Server 2019	-
Microsoft	Windows Server 2022	-

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-2644PatchVendor Advisory
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-2644PatchVendor Advisory

FAQ

What is CVE-2021-26443?

CVE-2021-26443 is a vulnerability with a CVSS score of 9.0 (CRITICAL). Microsoft Virtual Machine Bus (VMBus) Remote Code Execution Vulnerability

How severe is CVE-2021-26443?

CVE-2021-26443 has been rated CRITICAL with a CVSS base score of 9.0/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2021-26443?

Check the references section above for vendor advisories and patch information. Affected products include: Microsoft Windows 10, Microsoft Windows 11, Microsoft Windows Server 2016, Microsoft Windows Server 2019, Microsoft Windows Server 2022.