Microsoft · Security update · October 13, 2020

KB4577671: October 2020 cumulative update for Windows 10 1903

KB4577671, released October 13, 2020, fixes 50 CVEs across 8 products. None of them is reported as exploited. Patch Radar priority: Urgent. The product is no longer supported.

Urgent3 publicly disclosedUnsupported product
CVEs closed
50
7 rated Critical
Exploited
0
None reported
Exploitation more likely
5
Vendor assessment
Highest EPSS
0.1345
96th percentile

Priority of the 50 CVEs

Patch now 0 Urgent 12 High 30 Routine 8

Applies to

Product
Windows 10 Version 1903 for 32-bit Systems
Windows 10 Version 1903 for ARM64-based Systems
Windows 10 Version 1903 for x64-based Systems
Windows 10 Version 1909 for 32-bit Systems
Windows 10 Version 1909 for ARM64-based Systems
Windows 10 Version 1909 for x64-based Systems
Windows Server, version 1903 (Server Core installation)
Windows Server, version 1909 (Server Core installation)

CVEs this fix closes

PriorityCVEComponentImpactCVSSEPSSExploitation
Urgent CVE-2020-16899 Microsoft Windows Denial of Service 7.5 0.1345 More likely
Urgent CVE-2020-16896 Windows RDP Information Disclosure 7.5 0.1260 More likely
Urgent CVE-2020-16898 Microsoft Windows Remote Code Execution 8.8 0.1094 Exploitation Less Likely
Urgent CVE-2020-16915 Windows Media Player Remote Code Execution 7.8 0.0984 Exploitation Less Likely
Urgent CVE-2020-16968 Microsoft Windows Codecs Library Remote Code Execution 7.8 0.0487 Exploitation Less Likely
Urgent CVE-2020-16911 Microsoft Graphics Component Remote Code Execution 8.8 0.0445 Exploitation Less Likely
Urgent CVE-2020-16967 Microsoft Windows Codecs Library Remote Code Execution 7.8 0.0421 Exploitation Less Likely
Urgent CVE-2020-16923 Microsoft Graphics Component Remote Code Execution 7.8 0.0383 Exploitation Less Likely
Urgent CVE-2020-16907 Microsoft Windows Elevation of Privilege 7.8 0.0100 More likely
Urgent CVE-2020-16913 Windows Kernel Elevation of Privilege 7.8 0.0100 More likely
Urgent CVE-2020-16891 Windows Hyper-V Remote Code Execution 8.8 0.0095 Exploitation Less Likely
Urgent CVE-2020-16922 Microsoft Windows Spoofing 5.3 0.0081 More likely
High CVE-2020-16927 Windows RDP Denial of Service 7.5 0.0592 Exploitation Less Likely
High CVE-2020-1167 Microsoft Graphics Component Remote Code Execution 7.8 0.0472 Exploitation Less Likely
High CVE-2020-16924 Microsoft Windows Remote Code Execution 7.8 0.0412 Exploitation Less Likely
High CVE-2020-16939 Group Policy Elevation of Privilege 7.8 0.0242 Exploitation Less Likely
High CVE-2020-16940 Microsoft Windows Elevation of Privilege 7.8 0.0155 Exploitation Less Likely
High CVE-2020-16920 Microsoft Windows Elevation of Privilege 7.8 0.0142 Exploitation Less Likely
High CVE-2020-16895 Microsoft Windows Elevation of Privilege 7.8 0.0103 Exploitation Less Likely
High CVE-2020-16885 Microsoft Windows Elevation of Privilege 7.8 0.0102 DisclosedExploitation Less Likely
High CVE-2020-16935 Microsoft Windows Elevation of Privilege 7.8 0.0100 Exploitation Less Likely
High CVE-2020-16890 Windows Secure Kernel Mode Elevation of Privilege 7.8 0.0100 Exploitation Less Likely
High CVE-2020-16916 Windows COM Elevation of Privilege 7.8 0.0098 Exploitation Less Likely
High CVE-2020-0764 Microsoft Windows Elevation of Privilege 7.8 0.0096 Exploitation Less Likely
High CVE-2020-16877 Microsoft Windows Elevation of Privilege 7.1 0.0096 Exploitation Less Likely
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