Patch tracker / Products / Microsoft Exchange Server Subscription Edition
Microsoft Exchange Server Subscription Edition: vulnerabilities and security updates
Every CVE affecting Microsoft Exchange Server Subscription Edition 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
40
Updates (KBs)
10
Actively exploited (KEV)
1
Critical Severity
9
CVEs affecting Microsoft Exchange Server Subscription Edition
Updates (KBs) for Microsoft Exchange Server Subscription Edition
| Update | Released | Severity | CVSS | EPSS | CVEs | Status |
|---|---|---|---|---|---|---|
| KB5094139 | 2026-05-12 | High | 8.1 | 0.5% | 1 | KEV |
| KB5103212 | 2026-07-14 | Critical | 9.6 | 2.5% | 11 | - |
| KB5047155 | 2025-08-12 | High | 8.0 | 7.7% | 1 | - |
| KB5121608 | 2026-09-08 | Critical | 9.3 | 1.2% | 9 | - |
| KB5121573 | 2026-08-11 | High | 8.8 | 2.0% | 7 | - |
| KB5066366 | 2025-10-14 | High | 8.8 | 1.0% | 3 | - |
| KB5129955 | 2026-10-02 | High | 8.8 | 0.5% | 1 | - |
| KB5074992 | 2026-02-10 | Medium | 6.5 | 8.1% | 1 | - |
| KB5063224 | 2025-08-12 | High | 7.5 | 1.4% | 4 | - |
| KB5071876 | 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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