Patch tracker / Products / Microsoft Exchange Server 2016
Microsoft Exchange Server 2016: vulnerabilities and security updates
Every CVE affecting Microsoft Exchange Server 2016 and the Microsoft update (KB) that fixes it, ranked by real-world risk. Actively exploited (CISA KEV) first, then EPSS exploit probability, on top of CVSS severity.
CVEs
46
Updates (KBs)
12
Actively exploited (KEV)
1
Critical Severity
4
CVEs affecting Microsoft Exchange Server 2016
Updates (KBs) for Microsoft Exchange Server 2016
| Update | Released | Severity | CVSS | EPSS | CVEs | Status |
|---|---|---|---|---|---|---|
| KB5094144 | 2026-05-12 | High | 8.1 | 71% | 1 | KEV |
| KB5103215 | 2026-06-09 | Critical | 9.6 | 20% | 11 | - |
| KB5050674 | 2025-08-12 | High | 8.0 | 7.6% | 1 | - |
| KB5049233 | 2024-11-12 | High | 7.5 | 8.5% | 1 | - |
| KB5128898 | 2026-10-13 | Critical | 9.3 | 1.7% | 6 | - |
| KB5121611 | 2026-09-08 | Critical | 9.3 | 1.2% | 8 | - |
| KB5129958 | 2026-10-13 | High | 8.8 | 2.8% | 1 | - |
| KB5121576 | 2026-08-11 | High | 8.8 | 2.0% | 7 | - |
| KB5066369 | 2025-10-14 | High | 8.8 | 1.0% | 3 | - |
| KB5074995 | 2026-02-10 | Medium | 6.5 | 8.3% | 1 | - |
| KB5063223 | 2025-08-12 | High | 7.5 | 1.4% | 4 | - |
| KB5071873 | 2025-12-09 | High | 7.5 | 1.0% | 2 | - |
Ranked across all products on the Microsoft patch tracker and the CVE and vulnerability management reference. Browse every product: product index.
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