Critical CVSS 8.5 EPSS 0.05238 2020-12 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 Dec 8 2020
Last Updated Dec 8 2020
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.05238 — 0.91457 percentile

CVSS Vector

ATTACK VECTOR
Network
ATTACK COMPLEXITY
High
PRIVILEGES REQUIRED
Low
USER INTERACTION
None
SCOPE
Changed
Temporal Score: 7.4

EPSS Score

0.05238
probability of exploitation in the next 30 days
0.91457 percentile - updated 2026-06-20
View on FIRST.org

Affected Products

15 affected products
Product KB Article Severity Impact Restart Required
Windows 10 Version 1607 for x64-based Systems 4593226 (Security Update) Critical Remote Code Execution Yes
Windows 10 Version 1803 for x64-based Systems 4592446 (Security Update) Critical Remote Code Execution Yes
Windows 10 Version 1809 for x64-based Systems 4592440 (Security Update) Critical Remote Code Execution Yes
Windows 10 Version 1903 for x64-based Systems 4592449 (Security Update) Critical Remote Code Execution Yes
Windows 10 Version 1909 for x64-based Systems 4592449 (Security Update) Critical Remote Code Execution Yes
Windows 10 Version 2004 for x64-based Systems 4592438 (Security Update) Critical Remote Code Execution Yes
Windows 10 Version 20H2 for x64-based Systems 4592438 (Security Update) Critical Remote Code Execution Yes
Windows Server 2016 4593226 (Security Update) Critical Remote Code Execution Yes
Windows Server 2016 (Server Core installation) 4593226 (Security Update) Critical Remote Code Execution Yes
Windows Server 2019 4592440 (Security Update) Critical Remote Code Execution Yes
Windows Server 2019 (Server Core installation) 4592440 (Security Update) Critical Remote Code Execution Yes
Windows Server, version 1903 (Server Core installation) 4592449 (Security Update) Critical Remote Code Execution Yes
Windows Server, version 1909 (Server Core installation) 4592449 (Security Update) Critical Remote Code Execution Yes
Windows Server, version 2004 (Server Core installation) 4592438 (Security Update) Critical Remote Code Execution Yes
Windows Server, version 20H2 (Server Core Installation) 4592438 (Security Update) Critical Remote Code Execution Yes

Patches

5 patches
Article Type Restart
4593226 Security Update Yes
4592446 Security Update Yes
4592440 Security Update Yes
4592449 Security Update Yes
4592438 Security Update Yes

Known Exploits

Acknowledgments