Microsoft · Security update · November 9, 2021
KB5007233: November 2021 security update
KB5007233, released November 9, 2021, fixes 15 CVEs across 4 products. 3 of them are being exploited (CVE-2021-42287); 3 on CISA KEV. Patch Radar priority: Patch now. The product is no longer supported.
Patch now3 on CISA KEVKnown ransomware use2 publicly disclosedUnsupported product
CVEs closed
15
1 rated Critical
Exploited
3
CVE-2021-42287
Exploitation more likely
1
Microsoft's assessment
Highest EPSS
0.7717
99th percentile
Priority of the 15 CVEs
Patch now 3
Urgent 1
High 9
Routine 2
Applies to
CVEs this fix closes
| Priority | CVE | Component | Impact | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|---|
| Patch now | CVE-2021-42287 | Windows Active Directory | Elevation of Privilege | 7.5 | 0.7717 | KEVRansomwareExploited |
| Patch now | CVE-2021-42278 | Windows Active Directory | Elevation of Privilege | 7.5 | 0.7330 | KEVRansomwareExploited |
| Patch now | CVE-2021-41379 | Windows Installer | Elevation of Privilege | 5.5 | 0.1945 | KEVRansomwareExploited |
| Urgent | CVE-2021-38666 | Windows RDP | Remote Code Execution | 8.8 | 0.1518 | More likely |
| High | CVE-2021-38665 | Windows RDP | Information Disclosure | 7.4 | 0.0702 | Exploitation Less Likely |
| High | CVE-2021-42282 | Windows Active Directory | Elevation of Privilege | 7.5 | 0.0417 | Exploitation Less Likely |
| High | CVE-2021-42291 | Windows Active Directory | Elevation of Privilege | 7.5 | 0.0417 | Exploitation Less Likely |
| High | CVE-2021-42275 | Windows COM | Remote Code Execution | 8.8 | 0.0210 | Exploitation Less Likely |
| High | CVE-2021-42285 | Windows Kernel | Elevation of Privilege | 7.8 | 0.0055 | Exploitation Less Likely |
| High | CVE-2021-42283 | Windows NTFS | Elevation of Privilege | 8.8 | 0.0049 | Exploitation Less Likely |
| High | CVE-2021-41367 | Windows NTFS | Elevation of Privilege | 7.8 | 0.0049 | Exploitation Less Likely |
| High | CVE-2021-41370 | Windows NTFS | Elevation of Privilege | 7.8 | 0.0049 | Exploitation Less Likely |
| High | CVE-2021-41377 | Windows Fast FAT Driver | Elevation of Privilege | 7.8 | 0.0049 | Exploitation Less Likely |
| Routine | CVE-2021-38631 | Windows RDP | Information Disclosure | 4.4 | 0.0188 | DisclosedExploitation Less Likely |
| Routine | CVE-2021-41371 | Windows RDP | Information Disclosure | 4.4 | 0.0165 | DisclosedExploitation Less Likely |
Showing 1 to 15 of 15
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