Null pointer dereference in Skype for Business allows an authorized attacker to deny service over a network.

Project Subscriptions

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

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Fixes

Solution

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Workaround

No workaround given by the vendor.

History

Tue, 08 Sep 2026 21:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Tue, 08 Sep 2026 19:00:00 +0000

Type Values Removed Values Added
Description Null pointer dereference in Skype for Business allows an authorized attacker to deny service over a network.
Title Skype for Business and Lync Denial of Service 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-476
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': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-09-08T20:44:57.922Z

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

Link: CVE-2026-66303

cve-icon Vulnrichment

Updated: 2026-09-08T20:44:50.703Z

cve-icon NVD

Status : Undergoing Analysis

Published: 2026-09-08T19:18:07.820

Modified: 2026-09-08T21:18:24.307

Link: CVE-2026-66303

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses