PT-2026-88286 · Microsoft · Skype For Business Server 2015 Cu13+2

CVE-2026-66307

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Published

2026-09-08

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Updated

2026-09-08

CVSS v3.1

7.5

High

VectorAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Integer underflow (wrap or wraparound) in Skype for Business allows an unauthorized attacker to deny service over a network.

Fix

Integer Underflow

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Weakness Enumeration

CWE-191

Related Identifiers

CVE-2026-66307

Affected Products

Skype For Business Server 2015 Cu13
Skype For Business Server 2019 Cu8
Skype For Business Server Subscription Edition Cu1