Microsoft · Security update · April 13, 2021

KB5001383: April 2021 security update

KB5001383, released April 13, 2021, fixes 54 CVEs across 2 products. None of them is reported as exploited. Patch Radar priority: Urgent.

Urgent2 publicly disclosed
CVEs closed
54
14 rated Critical
Exploited
0
None reported
Exploitation more likely
2
Vendor assessment
Highest EPSS
0.6410
99th percentile

Priority of the 54 CVEs

Patch now 0 Urgent 16 High 26 Routine 12

Applies to

Product
Windows Server 2012
Windows Server 2012 (Server Core installation)

CVEs this fix closes

PriorityCVEComponentImpactCVSSEPSSExploitation
Urgent CVE-2021-28325 Windows SMB Server Information Disclosure 6.5 0.6410 More likely
Urgent CVE-2021-27095 Windows Media Player Remote Code Execution 7.8 0.0435 Exploitation Less Likely
Urgent CVE-2021-28333 Windows Remote Procedure Call Runtime Remote Code Execution 8.8 0.0254 Exploitation Less Likely
Urgent CVE-2021-28329 Windows Remote Procedure Call Runtime Remote Code Execution 8.8 0.0247 Exploitation Less Likely
Urgent CVE-2021-28330 Windows Remote Procedure Call Runtime Remote Code Execution 8.8 0.0247 Exploitation Less Likely
Urgent CVE-2021-28331 Windows Remote Procedure Call Runtime Remote Code Execution 8.8 0.0247 Exploitation Less Likely
Urgent CVE-2021-28332 Windows Remote Procedure Call Runtime Remote Code Execution 8.8 0.0247 Exploitation Less Likely
Urgent CVE-2021-28334 Windows Remote Procedure Call Runtime Remote Code Execution 8.8 0.0247 Exploitation Less Likely
Urgent CVE-2021-28335 Windows Remote Procedure Call Runtime Remote Code Execution 8.8 0.0247 Exploitation Less Likely
Urgent CVE-2021-28336 Windows Remote Procedure Call Runtime Remote Code Execution 8.8 0.0247 Exploitation Less Likely
Urgent CVE-2021-28337 Windows Remote Procedure Call Runtime Remote Code Execution 8.8 0.0247 Exploitation Less Likely
Urgent CVE-2021-28338 Windows Remote Procedure Call Runtime Remote Code Execution 8.8 0.0247 Exploitation Less Likely
Urgent CVE-2021-28339 Windows Remote Procedure Call Runtime Remote Code Execution 8.8 0.0247 Exploitation Less Likely
Urgent CVE-2021-28343 Windows Remote Procedure Call Runtime Remote Code Execution 8.8 0.0247 Exploitation Less Likely
Urgent CVE-2021-28315 Windows Media Player Remote Code Execution 7.8 0.0160 Exploitation Less Likely
Urgent CVE-2021-27072 Windows Win32K Elevation of Privilege 7.0 0.0065 More likely
High CVE-2021-28439 Windows TCP/IP Denial of Service 7.5 0.0653 Exploitation Less Likely
High CVE-2021-26415 Windows Installer Elevation of Privilege 7.8 0.0357 Exploitation Less Likely
High CVE-2021-28445 Windows Network File System Remote Code Execution 8.1 0.0290 Exploitation Less Likely
High CVE-2021-28327 Windows Remote Procedure Call Runtime Remote Code Execution 8.8 0.0254 Exploitation Less Likely
High CVE-2021-28340 Windows Remote Procedure Call Runtime Remote Code Execution 8.8 0.0254 Exploitation Less Likely
High CVE-2021-28344 Windows Remote Procedure Call Runtime Remote Code Execution 8.8 0.0254 Exploitation Less Likely
High CVE-2021-28356 Windows Remote Procedure Call Runtime Remote Code Execution 8.8 0.0254 Exploitation Less Likely
High CVE-2021-28341 Windows Remote Procedure Call Runtime Remote Code Execution 8.8 0.0247 Exploitation Less Likely
High CVE-2021-28342 Windows Remote Procedure Call Runtime Remote Code Execution 8.8 0.0247 Exploitation Less Likely
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