CVE-2026-66305

Summary

Use of client-side authentication in Skype for Business allows an authorized attacker to perform spoofing over a network.

Affected Software

VendorProductVersion RangeStatus
MicrosoftSkype for Business Server 2015 CU139319.0 < 6.0.9319.885affected
MicrosoftSkype for Business Server 2019 CU82046.0 < 7.0.2046.569affected
MicrosoftSkype for Business Server Subscription Edition CU12046.0 < 7.0.2046.879affected

Weaknesses

  • CWE-603: CWE-603: Use of Client-Side Authentication

References