CVE-2026-66306

Published: Sep 8, 2026Modified: Sep 16, 2026

6.5

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Exploitability: 2.8 / Impact: 3.6

Source: secure@microsoft.com

Description

Generation of error message containing sensitive information in Skype for Business allows an unauthorized attacker to disclose information over a network.

Affected (6)

Products: Microsoft: Skype For Business Server, Skype For Business Server Subscription Edition

Microsoft

2 products

Skype For Business Server

Skype For Business Server Subscription Edition

Configuration A

2 vulnerable

Vulnerable Software	Affected Versions
Microsoft Skype For Business Server	Version 2015 cumulative_update_13
Microsoft Skype For Business Server	Version 2015 cumulative_update_13_hotfix_2

Configuration B

3 vulnerable

Vulnerable Software	Affected Versions
Microsoft Skype For Business Server	Version 2019 cumulative_update_8
Microsoft Skype For Business Server	Version 2019 cumulative_update_8_hotfix1
Microsoft Skype For Business Server	Version 2019 cumulative_update_8_hotfix2

Configuration C

1 vulnerable

Vulnerable Software	Affected Versions
Microsoft Skype For Business Server Subscription Edition	Version 7.0.2046.849

Related CWEs

CWE-209

Generation of Error Message Containing Sensitive Information

The product generates an error message that includes sensitive information about its environment, users, or associated data.

References (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66306

Source: secure@microsoft.com

PatchVendor Advisory

Timeline

No history available yet.