Microsoft · Security update · January 10, 2023
KB5022143: January 2023 security update
KB5022143, released January 10, 2023, fixes 5 CVEs in Microsoft Exchange Server 2016 Cumulative Update 23. None of them is reported as exploited. Patch Radar priority: Urgent.
Urgent
CVEs closed
5
None rated Critical
Exploited
0
None reported
Exploitation more likely
1
Microsoft's assessment
Highest EPSS
0.0164
76th percentile
Priority of the 5 CVEs
Patch now 0
Urgent 1
High 4
Routine 0
Applies to
CVEs this fix closes
| Priority | CVE | Component | Impact | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|---|
| Urgent | CVE-2023-21745 | Microsoft Exchange Server | Spoofing | 8.0 | 0.0154 | More likely |
| High | CVE-2023-21761 | Microsoft Exchange Server | Information Disclosure | 7.5 | 0.0164 | Exploitation Less Likely |
| High | CVE-2023-21762 | Microsoft Exchange Server | Spoofing | 8.0 | 0.0159 | Exploitation Less Likely |
| High | CVE-2023-21763 | Microsoft Exchange Server | Elevation of Privilege | 7.8 | 0.0062 | Exploitation Less Likely |
| High | CVE-2023-21764 | Microsoft Exchange Server | Elevation of Privilege | 7.8 | 0.0058 | Exploitation Less Likely |
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