---
id: CVE-2026-83746
title: >-
  Absolute path traversal in Skype for Business and Microsoft Lync allows an
  authorized attacker to elevate privileges over a network.
summary: >-
  Absolute path traversal in Skype for Business and Microsoft Lync allows an
  authorized attacker to elevate privileges over a network.
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H'
cwe:
  - CWE-36
published: '2026-10-13'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T21:18:44.960'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-83746'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83746'
    label: secure@microsoft.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-13T19:43:29.099Z'
vendor: Microsoft
product: Skype for Business Server 2015 CU13
affected:
  - skype_for_business_server_2015_cu13 >= 9319.0 < 6.0.9319.886
  - skype_for_business_server_2019_cu8 >= 2046.0 < 7.0.2046.583
  - skype_for_business_server_subscription_edition_cu1 >= 2046.0 < 7.0.2046.889
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-13T20:31:53.146326Z'
epss: 0.01147
epssPercentile: 0.66614
---

## Overview

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

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.