CVE-2026-85873

Skype for Business Elevation of Privilege Vulnerability

Published Oct 13, 2026 CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Description
Improper authorization in Skype for Business and Microsoft Lync allows an authorized attacker to elevate privileges over a network.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
CPEs cpe:2.3:a:microsoft:skype_for_business_server_subscription_edition_rtm:*:*:*:*:*:*:*:*
Vendors & Products Microsoft skype For Business Server Subscription Edition Rtm
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Improper authorization in Skype for Business and Microsoft Lync allows an authorized attacker to elevate privileges over a network.
Title Skype for Business Elevation of Privilege Vulnerability
First Time appeared Microsoft
Microsoft skype For Business Server 2015
Microsoft skype For Business Server 2019
Microsoft skype For Business Server Subscription Edition
Microsoft skype For Business Server Subscription Edition Rtm
Weaknesses CWE-639
CPEs cpe:2.3:a:microsoft:skype_for_business_server_2015:*:cu13:*:*:*:*:*:*
cpe:2.3:a:microsoft:skype_for_business_server_2019:*:cu8:*:*:*:*:*:*
cpe:2.3:a:microsoft:skype_for_business_server_subscription_edition:*:cu1:*:*:*:*:*:*
cpe:2.3:a:microsoft:skype_for_business_server_subscription_edition_rtm:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft skype For Business Server 2015
Microsoft skype For Business Server 2019
Microsoft skype For Business Server Subscription Edition
Microsoft skype For Business Server Subscription Edition Rtm
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
microsoft
Published
Updated
Nov 10, 2026, 8:43 PM
Reserved
Sep 4, 2026, 6:18 PM
Status
Undergoing Analysis
Published
Oct 13, 2026, 7:21 PM
Modified
Oct 16, 2026, 2:18 PM