CVE-2026-66302 CRITICAL

CVE-2026-66302: Skype for Business Remote Code Execution Vulnerability

Vendor Microsoft
Product Skype for Business Server 2015 CU13
Weakness CWE-73
Published September 8, 2026
Last update September 18, 2026
View on NVD All CVEs

CVSS base score

9.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

What the vulnerability does

01Description

External control of file name or path in Skype for Business allows an unauthorized attacker to execute code over a network.

Key dates

02Disclosure timeline

September 8, 2026 CVE published
September 18, 2026 Record updated

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04Related CVE

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