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Microsoft Security Response CenterCVE-2026-70297

Skype for Business Remote Code Execution Vulnerability

HighVendor CVSS 8.8 / 10 1 CVE Published Oct 13, 2026 at 7:00 AM UTC

Summary

Absolute path traversal in Skype for Business and Microsoft Lync allows an authorized attacker to execute code over a network.

Products covered

  • Skype for Business Server Subscription Edition CU1

  • Skype for Business Server 2015 CU13

  • Skype for Business Server 2019 CU8

Remediation

Install KB5131692. Install KB5132779. Install KB5131693.

Vendor-listed fixes

  • 7.0.2046.889

  • 6.0.9319.886

  • 7.0.2046.583

CVEs in this advisory 1

Updates

  1. Published by Microsoft Security Response Center

    The publication date reported by the vendor.

  2. Added to SecurityAlert

    We collected the advisory from the official source.

  3. Confirmed at the source

    Our collector saw this advisory during a later source check.