Microsoft security update for CVE-2026-66302 — Skype for Business Server
🔗 CVE IDs covered (1)
📋 Microsoft's advisory
EchelonGraph does not copy Microsoft's advisory page: its FAQ and remediation text are not shown here. Read the advisory on https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66302. This page also shows what EchelonGraph holds for CVE-2026-66302, with the description from its CVE record, which the CVE Numbering Authority that assigned the CVE wrote: for a CVE Microsoft assigned, often in the words of Microsoft's own advisory.
🎯 Affected products3
- Skype for Business Server 2015 CU13
- Skype for Business Server 2019 CU8
- Skype for Business Server Subscription Edition CU1
✅ Updates Microsoft lists: 3 updates
3 rows: one per KB article or update, update type and fixed build. Their details are on Microsoft's advisory.
| KB article | Update | Fixed build |
|---|---|---|
| — | Security Update | 7.0.2046.879 |
| — | Security Update | 7.0.2046.569 |
| — | Security Update | 6.0.9319.885 |
🧭 EchelonGraph on CVE-2026-66302
- EchelonGraph score
- 9.8 CRITICAL
- CISA KEV
- Not listed
- Fix status
- A fix is available — apply it.
Description from the CVE record (CVE.org), as published by its numbering authority
External control of file name or path in Skype for Business allows an unauthorized attacker to execute code over a network.
Published by Microsoft Corporation, the CVE Numbering Authority that assigned CVE-2026-66302, in its CVE record at CVE.org; reused under the CVE Program's Terms of Use (its licence and MITRE's copyright notice are in our Terms of Service).