Microsoft · Microsoft
Microsoft Exchange Server 2016 Cumulative Update 23 security updates
Patch Radar has 24 security fixes for Microsoft Exchange Server 2016 Cumulative Update 23, closing 87 CVEs, 5 of which are being exploited. The newest security fix is KB5128898, released October 13, 2026.
5 exploited CVEs
Latest version
n/a
Release date not known
Security fixes
24
On record in Patch Radar
CVEs
87
Closed by those fixes
Exploited
5
Vendor report or CISA KEV
Security fixes, newest first
| Priority | Fix | Fixed in | CVEs | Exploited | Released |
|---|---|---|---|---|---|
| Urgent | KB5128898 | 6 | Oct 13, 2026 | ||
| Urgent | KB5129958 | 1 | Oct 2, 2026 | ||
| High | KB5121611 | 8 | Sep 8, 2026 | ||
| Urgent | KB5121576 | 7 | Aug 11, 2026 | ||
| Urgent | KB5103215 | 11 | Jun 9, 2026 | ||
| Routine | KB5074995 | 1 | Feb 10, 2026 | ||
| High | KB5071873 | 2 | Dec 9, 2025 | ||
| High | KB5066369 | 3 | Oct 14, 2025 | ||
| Urgent | KB5050674 | 1 | Aug 12, 2025 | ||
| High | KB5063223 | 4 | Aug 12, 2025 | ||
| Urgent | KB5049233 | 1 | Nov 12, 2024 | ||
| High | KB5037224 | 1 | Mar 12, 2024 | ||
| Patch now | KB5036386 | 1 | 1 | Feb 14, 2024 | |
| Urgent | KB5032147 | 4 | Nov 14, 2023 | ||
| Urgent | KB5030877 | 1 | Oct 10, 2023 | ||
| Urgent | KB5030524 | 11 | Sep 12, 2023 | ||
| Urgent | KB5025903 | 2 | Jun 13, 2023 | ||
| Patch now | KB5023038 | 3 | 1 | Feb 14, 2023 | |
| Urgent | KB5024296 | 1 | Feb 14, 2023 | ||
| Urgent | KB5022143 | 5 | Jan 10, 2023 | ||
| Patch now | KB5019758 | 6 | 3 | Nov 8, 2022 | |
| Urgent | KB5019077 | 5 | Aug 9, 2022 | ||
| Routine | KB5015322 | 1 | Aug 9, 2022 | ||
| High | KB5014261 | 1 | May 10, 2022 |
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