OnlyPatch
Role: Windows Hyper-V

CVE-2021-34450 — Windows Hyper-V Remote Code Execution Vulnerability

Critical CVSS 8.5 2021-07 archive

Executive Summary

None

Overview

8.5
CVSS HIGH
Critical
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
Category Remote Code Execution
Released Jul 13 2021
Last Updated Jul 13 2021
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
NVD CVSS 8.5 HIGH — matches MSRC

CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C
ATTACK VECTOR
Network
ATTACK COMPLEXITY
High
PRIVILEGES REQUIRED
Low
USER INTERACTION
None
SCOPE
Changed
CONFIDENTIALITY
High
INTEGRITY
High
AVAILABILITY
High
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 7.4

EPSS Score

No EPSS score available for this CVE.

View on FIRST.org

Affected Products

8 affected products
Product KB Article Severity Impact Restart Required
Windows 10 Version 1809 for x64-based Systems 5004244 (Security Update) Critical Remote Code Execution Yes
Windows Server 2019 5004244 (Security Update) Critical Remote Code Execution Yes
Windows Server 2019 (Server Core installation) 5004244 (Security Update) Critical Remote Code Execution Yes
Windows 10 Version 1909 for x64-based Systems 5004245 (Security Update) Critical Remote Code Execution Yes
Windows 10 Version 21H1 for x64-based Systems 5004237 (Security Update) Critical Remote Code Execution Yes
Windows 10 Version 2004 for x64-based Systems 5004237 (Security Update) Critical Remote Code Execution Yes
Windows Server, version 2004 (Server Core installation) 5004237 (Security Update) Critical Remote Code Execution Yes
Windows Server, version 20H2 (Server Core Installation) 5004237 (Security Update) Critical Remote Code Execution Yes

Patches

3 patches
Article Type Restart
5004244 Security Update Yes
5004245 Security Update Yes
5004237 Security Update Yes

Known Exploits

Acknowledgments

Microsoft Platform Security Assurance & Vulnerability Research

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