CVE-2026-83746

Skype for Business Elevation of Privilege Vulnerability

CVE-2026-83746 is fixed in 3 products on 1 platform, first by KB5132779, released October 13, 2026. It is not reported as exploited. Patch Radar priority: High.

High

CVSS

8.1

Important

Exploitation

None reported

Exploitation Less Likely

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0115

66th percentile

<p>Absolute path traversal in Skype for Business and Microsoft Lync allows an authorized attacker to elevate privileges over a network.</p>

Where it's fixed

Product	Fix	Released
Microsoft
Skype for Business Server 2015 CU13	KB5132779	Oct 13, 2026
Skype for Business Server 2019 CU8	KB5131693	Oct 13, 2026
Skype for Business Server Subscription Edition CU1	KB5131692	Oct 13, 2026

Details

Published
October 13, 2026
Weakness
Absolute Path Traversal
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83746

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