CVE-2026-63523

Skype for Business Spoofing Vulnerability

State: Published
Severity: 6.5 Medium
Published: Sep 8, 2026
Updated: Oct 31, 2026
Reserved: Jul 16, 2026

Description

Improper neutralization of input during web page generation ('cross-site scripting') in Skype for Business allows an unauthorized attacker to perform spoofing over a network.

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C	microsoft

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected Products

Product	Versions
Skype for Business Server 2015 CU13Microsoft	9319.0 to before 6.0.9319.885Affected
Skype for Business Server 2019 CU8Microsoft	2046.0 to before 7.0.2046.569Affected
Skype for Business Server Subscription Edition CU1Microsoft	2046.0 to before 7.0.2046.879Affected

References

Skype for Business Spoofing Vulnerabilityvendor-advisorypatch

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