Microsoft · Security update · March 9, 2021
KB5000844: March 2021 security update
KB5000844, released March 9, 2021, fixes 21 CVEs across 6 products. One of them is being exploited (CVE-2021-26411); 1 on CISA KEV. Patch Radar priority: Patch now. The product is no longer supported.
Patch now1 on CISA KEVKnown ransomware use2 publicly disclosedUnsupported product
CVEs closed
21
2 rated Critical
Exploited
1
CVE-2021-26411
Exploitation more likely
2
Microsoft's assessment
Highest EPSS
0.8167
99th percentile
Priority of the 21 CVEs
Patch now 1
Urgent 2
High 17
Routine 1
Applies to
CVEs this fix closes
| Priority | CVE | Component | Impact | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|---|
| Patch now | CVE-2021-26411 | Internet Explorer | Remote Code Execution | 8.8 | 0.8167 | KEVRansomwareDisclosedExploited |
| Urgent | CVE-2021-26877 | Role: DNS Server | Remote Code Execution | 9.8 | 0.1729 | More likely |
| Urgent | CVE-2021-26897 | Role: DNS Server | Remote Code Execution | 9.8 | 0.1164 | More likely |
| High | CVE-2021-26896 | Role: DNS Server | Denial of Service | 7.5 | 0.0785 | Exploitation Less Likely |
| High | CVE-2021-26894 | Role: DNS Server | Remote Code Execution | 9.8 | 0.0776 | Exploitation Less Likely |
| High | CVE-2021-26895 | Role: DNS Server | Remote Code Execution | 9.8 | 0.0776 | Exploitation Less Likely |
| High | CVE-2021-26893 | Role: DNS Server | Remote Code Execution | 9.8 | 0.0702 | Exploitation Less Likely |
| High | CVE-2021-27063 | Role: DNS Server | Denial of Service | 7.5 | 0.0673 | Exploitation Less Likely |
| High | CVE-2021-26861 | Microsoft Graphics Component | Remote Code Execution | 7.8 | 0.0289 | Exploitation Less Likely |
| High | CVE-2021-26882 | Windows Remote Access API | Elevation of Privilege | 7.8 | 0.0211 | Exploitation Less Likely |
| High | CVE-2021-27077 | Microsoft Graphics Component | Elevation of Privilege | 7.8 | 0.0144 | DisclosedExploitation Less Likely |
| High | CVE-2021-26862 | Windows Installer | Elevation of Privilege | 7.0 | 0.0125 | Exploitation Less Likely |
| High | CVE-2021-26873 | Windows User Profile Service | Elevation of Privilege | 7.0 | 0.0115 | Exploitation Less Likely |
| High | CVE-2021-26899 | Windows UPnP Device Host | Elevation of Privilege | 7.8 | 0.0097 | Exploitation Less Likely |
| High | CVE-2021-1640 | Windows Print Spooler Components | Elevation of Privilege | 7.8 | 0.0095 | Exploitation Less Likely |
| High | CVE-2021-26898 | Windows Event Tracing | Elevation of Privilege | 7.8 | 0.0087 | Exploitation Less Likely |
| High | CVE-2021-26875 | Microsoft Graphics Component | Elevation of Privilege | 7.8 | 0.0087 | Exploitation Less Likely |
| High | CVE-2021-26878 | Windows Print Spooler Components | Elevation of Privilege | 7.8 | 0.0085 | Exploitation Less Likely |
| High | CVE-2021-26901 | Windows Event Tracing | Elevation of Privilege | 7.8 | 0.0082 | Exploitation Less Likely |
| High | CVE-2021-26872 | Windows Event Tracing | Elevation of Privilege | 7.8 | 0.0075 | Exploitation Less Likely |
| Routine | CVE-2021-24107 | Windows Event Tracing | Information Disclosure | 5.5 | 0.0103 | Exploitation Less Likely |
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