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

Wed, 09 Sep 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Tue, 08 Sep 2026 18:45:00 +0000

Type Values Removed Values Added
Description Use of client-side authentication in Skype for Business allows an authorized attacker to perform spoofing over a network.
Title Skype for Business Spoofing Vulnerability
First Time appeared Microsoft
Microsoft skype For Business Server 2015
Microsoft skype For Business Server 2019
Microsoft skype For Business Server Subscription Edition
Weaknesses CWE-603
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:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft skype For Business Server 2015
Microsoft skype For Business Server 2019
Microsoft skype For Business Server Subscription Edition
References
Metrics cvssV3_1

{'score': 7.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N/E:U/RL:O/RC:C'}


cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published: 2026-09-08T18:32:29.324Z

Updated: 2026-09-09T21:29:19.854Z

Reserved: 2026-07-24T18:06:51.294Z

Link: CVE-2026-66305

cve-icon Vulnrichment

Updated: 2026-09-09T15:49:58.996Z

cve-icon NVD

Status : Undergoing Analysis

Published: 2026-09-08T19:18:08.073

Modified: 2026-09-09T17:17:26.033

Link: CVE-2026-66305

cve-icon Redhat

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