Microsoft Security Response CenterCVE-2026-85873

Skype for Business Elevation of Privilege Vulnerability

HighVendor CVSS 6.5 / 10 1 CVE Published Oct 13, 2026 at 7:00 AM UTC

Summary

Improper authorization in Skype for Business and Microsoft Lync allows an authorized attacker to elevate privileges over a network.

Install KB5131692. Install KB5131693. Install KB5132779.

Update history

SecurityAlert records field-level changes from the point we begin following a bulletin. Earlier vendor changes may not have a field-by-field record.

Oct 16, 2026 at 5:40 AM UTC
- Removed affected products: Skype for Business Server Subscription Edition RTM.
- The vendor changed its remediation guidance.

Oct 13, 2026 at 7:00 AM UTC
Published by Microsoft Security Response Center
The publication date reported by the vendor.
Oct 13, 2026 at 10:55 PM UTC
Added to SecurityAlert
We collected the advisory from the official source.
Oct 21, 2026 at 1:15 AM UTC
Confirmed at the source
Our collector saw this advisory during a later source check.

Details collected from Microsoft Security Response Center.

Official bulletin How SecurityAlert builds this record

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