CVE-2021-1692: Windows Hyper-V Denial of Service Vulnerability

Overview

Severity

High (CVSS 7.7)

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C

Category

Denial of Service

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2021-Jan

Released

2021-01-12

Last Updated

2021-02-09

EPSS Score

0.81% (percentile: 74.2%)

Affected Products (16)

Windows

• Windows Server, version 20H2 (Server Core Installation)
• Windows 10 Version 1803 for x64-based Systems
• Windows 10 Version 1809 for x64-based Systems
• Windows Server 2019
• Windows Server 2019 (Server Core installation)
• Windows 10 Version 1909 for x64-based Systems
• Windows Server, version 1909 (Server Core installation)
• Windows 10 Version 2004 for x64-based Systems
• Windows Server, version 2004 (Server Core installation)
• Windows 10 for x64-based Systems
• Windows 10 Version 1607 for x64-based Systems
• Windows Server 2016
• Windows Server 2016 (Server Core installation)
• Windows 8.1 for x64-based systems

ESU

• Windows Server 2012 R2
• Windows Server 2012 R2 (Server Core installation)

Security Updates (8)

• 4601319
• 4601354
• 4601345
• 4601315
• 4598231
• 4598243
• 4598285
• 4598275

Acknowledgments

Wei

Revision History

• 2021-01-12: Information published.
• 2021-02-09: To comprehensively address CVE-2021-1692, Microsoft has released the February 2021 Security Updates for all affected editions of Windows 10 Version 1803 and newer because these versions are also affected by CVE-2021-1692. Microsoft strongly recommends that customers install the February updates to be fully protected from this vulnerability. Customers whose systems are configured to receive automatic updates do not need to take any further action.