CVE-2026-70297

Skype for Business Remote Code Execution Vulnerability

State: Published
Severity: 8.8 High
Published: Oct 13, 2026
Updated: Oct 31, 2026
Reserved: Aug 3, 2026

Description

Absolute path traversal in Skype for Business and Microsoft Lync allows an authorized attacker to execute code over a network.

Scores

CVSS	Score	Vector	Source
3.1	8.8 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C	microsoft

Weaknesses

CWE-36 Absolute Path Traversal

Affected Products

Product	Versions
Skype for Business Server 2015 CU13Microsoft	9319.0 to before 6.0.9319.886Affected
Skype for Business Server 2019 CU8Microsoft	2046.0 to before 7.0.2046.583Affected
Skype for Business Server Subscription Edition CU1Microsoft	2046.0 to before 7.0.2046.889Affected

References

Skype for Business Remote Code Execution Vulnerabilityvendor-advisorypatch

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