CVE-2026-66304

Skype for Business Information Disclosure Vulnerability

State: Published
Severity: 7.5 High
Published: Sep 8, 2026
Updated: Oct 31, 2026
Reserved: Jul 24, 2026

Description

Server-side request forgery (ssrf) in Skype for Business allows an unauthorized attacker to disclose information over a network.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C	microsoft

Weaknesses

CWE-918 Server-Side Request Forgery (SSRF)

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 Information Disclosure Vulnerabilityvendor-advisorypatch

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