Microsoft · Security update · June 8, 2021
KB5003635: June 2021 cumulative update for Windows 10 1909
KB5003635, released June 8, 2021, fixes 23 CVEs across 3 products. 7 of them are being exploited (CVE-2021-1675); 7 on CISA KEV. Patch Radar priority: Patch now. The product is no longer supported.
Patch now7 on CISA KEVKnown ransomware use2 publicly disclosedUnsupported product
CVEs closed
23
3 rated Critical
Exploited
7
CVE-2021-1675
Exploitation more likely
4
Microsoft's assessment
Highest EPSS
0.8531
99th percentile
Priority of the 23 CVEs
Patch now 7
Urgent 4
High 9
Routine 3
Applies to
| Product | Build after install |
|---|---|
| Windows 10 Version 1909 for 32-bit Systems | 18363.1621 |
| Windows 10 Version 1909 for ARM64-based Systems | 18363.1621 |
| Windows 10 Version 1909 for x64-based Systems | 18363.1621 |
CVEs this fix closes
| Priority | CVE | Component | Impact | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|---|
| Patch now | CVE-2021-1675 | Windows Print Spooler Components | Remote Code Execution | 7.8 | 0.8531 | KEVRansomwareExploited |
| Patch now | CVE-2021-31955 | Windows Kernel | Information Disclosure | 5.5 | 0.8111 | KEVExploited |
| Patch now | CVE-2021-33742 | Windows MSHTML Platform | Remote Code Execution | 7.5 | 0.5941 | KEVExploited |
| Patch now | CVE-2021-31956 | Windows NTFS | Elevation of Privilege | 7.8 | 0.2227 | KEVExploited |
| Patch now | CVE-2021-33739 | Windows DWM Core Library | Elevation of Privilege | 8.4 | 0.0661 | KEVDisclosedExploited |
| Patch now | CVE-2021-31199 | Windows Cryptographic Services | Elevation of Privilege | 5.2 | 0.0298 | KEVExploited |
| Patch now | CVE-2021-31201 | Windows Cryptographic Services | Elevation of Privilege | 5.2 | 0.0262 | KEVExploited |
| Urgent | CVE-2021-31959 | Microsoft Scripting Engine | Remote Code Execution | 6.4 | 0.0923 | More likely |
| Urgent | CVE-2021-31954 | Windows Common Log File System Driver | Elevation of Privilege | 7.8 | 0.0107 | More likely |
| Urgent | CVE-2021-31952 | Windows Kernel-Mode Drivers | Elevation of Privilege | 7.8 | 0.0081 | More likely |
| Urgent | CVE-2021-31951 | Windows Kernel | Elevation of Privilege | 7.8 | 0.0068 | More likely |
| High | CVE-2021-31974 | Windows Network File System | Denial of Service | 7.5 | 0.0673 | Exploitation Less Likely |
| High | CVE-2021-31962 | Windows Kerberos | Security Feature Bypass | 9.4 | 0.0381 | Exploitation Less Likely |
| High | CVE-2021-31975 | Windows Network File System | Information Disclosure | 7.5 | 0.0366 | Exploitation Less Likely |
| High | CVE-2021-31976 | Windows Network File System | Information Disclosure | 7.5 | 0.0366 | Exploitation Less Likely |
| High | CVE-2021-31977 | Role: Windows Hyper-V | Denial of Service | 8.6 | 0.0318 | Exploitation Less Likely |
| High | CVE-2021-31968 | Windows Remote Desktop | Denial of Service | 7.5 | 0.0318 | DisclosedExploitation Less Likely |
| High | CVE-2021-31958 | Windows NTLM | Elevation of Privilege | 7.5 | 0.0256 | Exploitation Less Likely |
| High | CVE-2021-31969 | Windows Drivers | Elevation of Privilege | 7.8 | 0.0122 | Exploitation Less Likely |
| High | CVE-2021-31973 | Windows Installer | Elevation of Privilege | 7.8 | 0.0055 | Exploitation Less Likely |
| Routine | CVE-2021-31971 | Windows HTML Platform | Security Feature Bypass | 6.8 | 0.0209 | Exploitation Less Likely |
| Routine | CVE-2021-31970 | Windows TCP/IP | Security Feature Bypass | 5.5 | 0.0086 | Exploitation Less Likely |
| Routine | CVE-2021-31972 | Windows Event Logging Service | Information Disclosure | 5.5 | 0.0076 | Exploitation Less Likely |
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