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

Project Subscriptions

Vendors Products
Microsoft Subscribe
Skype For Business Server Subscribe
Skype For Business Server 2015 Subscribe
Skype For Business Server 2019 Subscribe
Skype For Business Server Subscription Edition Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Wed, 16 Sep 2026 19:30:00 +0000

Type Values Removed Values Added
First Time appeared Microsoft skype For Business Server
CPEs cpe:2.3:a:microsoft:skype_for_business_server:2015:cumulative_update_13:*:*:*:*:*:*
cpe:2.3:a:microsoft:skype_for_business_server:2015:cumulative_update_13_hotfix_2:*:*:*:*:*:*
cpe:2.3:a:microsoft:skype_for_business_server:2019:cumulative_update_8:*:*:*:*:*:*
cpe:2.3:a:microsoft:skype_for_business_server:2019:cumulative_update_8_hotfix1:*:*:*:*:*:*
cpe:2.3:a:microsoft:skype_for_business_server:2019:cumulative_update_8_hotfix2:*:*:*:*:*:*
cpe:2.3:a:microsoft:skype_for_business_server_subscription_edition:7.0.2046.849:*:*:*:*:*:*:*
Vendors & Products Microsoft skype For Business Server

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'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-09-16T21:52:17.086Z

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 : Analyzed

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

Modified: 2026-09-16T19:24:00.377

Link: CVE-2026-66305

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-13T20:07:41Z

Weaknesses