Patch tracker / Products / Skype for Business Server Subscription Edition CU1
Skype for Business Server Subscription Edition CU1: vulnerabilities and security updates
Every CVE affecting Skype for Business Server Subscription Edition CU1 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
13
Updates (KBs)
2
Actively exploited (KEV)
0
Critical Severity
1
CVEs affecting Skype for Business Server Subscription Edition CU1
| CVE | Severity | CVSS | EPSS | Status |
|---|---|---|---|---|
| CVE-2026-66302 | Critical | 9.8 | 1.2% | - |
| CVE-2026-70297 | High | 8.8 | 1.0% | - |
| CVE-2026-69646 | High | 8.3 | 1.2% | - |
| CVE-2026-83746 | High | 8.1 | 1.0% | - |
| CVE-2026-66304 | High | 7.5 | 1.2% | - |
| CVE-2026-66307 | High | 7.5 | 1.2% | - |
| CVE-2026-66305 | High | 7.1 | 1.2% | - |
| CVE-2026-63523 | Medium | 6.5 | 1.2% | - |
| CVE-2026-66303 | Medium | 6.5 | 1.2% | - |
| CVE-2026-66306 | Medium | 6.5 | 1.2% | - |
| CVE-2026-66308 | Medium | 6.5 | 1.2% | - |
| CVE-2026-69642 | Medium | 6.5 | 1.2% | - |
| CVE-2026-85873 | Medium | 6.5 | 1.0% | - |
Updates (KBs) for Skype for Business Server Subscription Edition CU1
Ranked across all products on the Microsoft patch tracker and the CVE and vulnerability management reference. Browse every product: product index.