Microsoft · Security update · February 9, 2021

KB4601315: February 2021 cumulative update for Windows 10 1909

KB4601315, released February 9, 2021, fixes 28 CVEs across 4 products. 2 of them are being exploited (CVE-2020-1472); 2 on CISA KEV. Patch Radar priority: Patch now. The product is no longer supported.

Patch now2 on CISA KEVKnown ransomware use3 publicly disclosedUnsupported product
CVEs closed
28
10 rated Critical
Exploited
2
CVE-2020-1472
Exploitation more likely
6
Vendor assessment
Highest EPSS
0.9939
99th percentile

Priority of the 28 CVEs

Patch now 2 Urgent 12 High 6 Routine 8

Applies to

ProductBuild after install
Windows 10 Version 1909 for 32-bit Systems18363.1377
Windows 10 Version 1909 for ARM64-based Systems18363.1377
Windows 10 Version 1909 for x64-based Systems18363.1377
Windows Server, version 1909 (Server Core installation)18363.1377

CVEs this fix closes

PriorityCVEComponentImpactCVSSEPSSExploitation
Patch now CVE-2020-1472 Windows Netlogon Elevation of Privilege 10.0 0.9939 KEVRansomwareExploited
Patch now CVE-2021-1732 Windows Kernel Elevation of Privilege 7.8 0.7838 KEVRansomwareExploited
Urgent CVE-2021-24086 Windows TCP/IP Denial of Service 7.5 0.5896 More likely
Urgent CVE-2021-24093 Microsoft Graphics Component Remote Code Execution 8.8 0.4590 Exploitation Less Likely
Urgent CVE-2021-24074 Windows TCP/IP Remote Code Execution 9.8 0.2616 More likely
Urgent CVE-2021-24094 Windows TCP/IP Remote Code Execution 9.8 0.2214 More likely
Urgent CVE-2021-24078 Role: DNS Server Remote Code Execution 9.8 0.1189 More likely
Urgent CVE-2021-24091 Microsoft Windows Codecs Library Remote Code Execution 7.8 0.0338 Exploitation Less Likely
Urgent CVE-2021-24077 Role: Windows Fax Service Remote Code Execution 9.8 0.0287 Exploitation Less Likely
Urgent CVE-2021-24081 Microsoft Windows Codecs Library Remote Code Execution 7.8 0.0251 Exploitation Less Likely
Urgent CVE-2021-1722 Role: Windows Fax Service Remote Code Execution 8.1 0.0244 Exploitation Less Likely
Urgent CVE-2021-24088 Windows Print Spooler Components Remote Code Execution 8.8 0.0243 Exploitation Less Likely
Urgent CVE-2021-1727 Windows Installer Elevation of Privilege 7.8 0.0076 DisclosedMore likely
Urgent CVE-2021-1698 Windows Kernel Elevation of Privilege 7.8 0.0066 More likely
High CVE-2021-1692 Windows Hyper-V Denial of Service 7.7 0.0424 Exploitation Less Likely
High CVE-2021-1734 Windows Remote Procedure Call Information Disclosure 7.5 0.0381 Exploitation Less Likely
High CVE-2021-24083 Windows Address Book Remote Code Execution 7.8 0.0287 Exploitation Less Likely
High CVE-2021-24103 Windows Event Tracing Elevation of Privilege 7.8 0.0063 Exploitation Less Likely
High CVE-2021-25195 Windows PKU2U Elevation of Privilege 7.8 0.0063 Exploitation Less Likely
High CVE-2021-24102 Windows Event Tracing Elevation of Privilege 7.8 0.0055 Exploitation Less Likely
Routine CVE-2021-24080 Windows Trust Verification API Denial of Service 6.5 0.0305 Exploitation Less Likely
Routine CVE-2021-24084 Windows Mobile Device Management Information Disclosure 5.5 0.0275 Exploitation Less Likely
Routine CVE-2021-24082 Windows PowerShell Security Feature Bypass 4.3 0.0263 Exploitation Less Likely
Routine CVE-2021-24098 Windows Console Driver Denial of Service 5.5 0.0152 DisclosedExploitation Less Likely
Routine CVE-2021-24076 Role: Windows Hyper-V Information Disclosure 5.5 0.0095 Exploitation Less Likely
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