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TI-2019-00763 Aliases CVE-2019-1029GHSA-6m2x-7chh-x75q

Skype for Business and Lync Server Denial of Service Vulnerability

Priority LOW 35Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA.

Summary

A denial of service vulnerability exists in Skype for Business. An attacker who successfully exploited the vulnerability could cause Skype for Business to stop responding. Note that the denial of service would not allow an attacker to execute code or to elevate the attacker's user rights. To exploit the vulnerability, an attacker needs to obtain a dial-in link for a vulnerable server and then initiates a series of calls within a short amount of time. The update addresses the vulnerability by correcting the way that Skype for Business server handles objects in memory.

Why it matters now

EPSS 0.05281 92nd percentileScored 2026-11-07
Fix Fixed Microsoft Lync Server 2010 (Microsoft): publicationMicrosoft Lync Server 2013 (Microsoft): publication

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
MicrosoftMicrosoft Lync Server 2010before publicationpublicationPatch availableCNA
MicrosoftMicrosoft Lync Server 2013before publicationpublicationPatch availableCNA
  • Microsoft Lync Server 2010 VendorMicrosoft Affected before publication Fixed in publication Patch available CNA
  • Microsoft Lync Server 2013 VendorMicrosoft Affected before publication Fixed in publication Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:microsoft:lync_server:2010:*:*:*:*:*:*:*2010VulnerableMicrosoft
cpe:2.3:a:microsoft:lync_server:2013:*:*:*:*:*:*:*2013VulnerableMicrosoft
  • cpe:2.3:a:microsoft:lync_server:2010:*:*:*:*:*:*:* Versions 2010 Vulnerable ·Microsoft
  • cpe:2.3:a:microsoft:lync_server:2013:*:*:*:*:*:*:* Versions 2013 Vulnerable ·Microsoft

Remediation

  • Fix · CNA Microsoft Lync Server 2010 (Microsoft) Fixed in publication
  • Fix · CNA Microsoft Lync Server 2013 (Microsoft) Fixed in publication

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-1029
  2. 2026-10-03 Alias added: GHSA-6m2x-7chh-x75q

References

Patch 1

Advisory 1

  • TI-2013-01140 Microsoft Communicator 2007 R2, Lync 2010, Lync 2010 Attendee, and Lync Server 2013 do… CVSS 2.0HIGH 9.3
  • TI-2014-01426 Cross-site scripting (XSS) vulnerability in the Web Components Server in Microsoft Lync… CVSS 2.0MEDIUM 4.3
  • TI-2014-03321 The Server in Microsoft Lync Server 2013 allows remote attackers to cause a denial of… CVSS 2.0MEDIUM 5.0
  • TI-2014-03319 The Response Group Service in Microsoft Lync Server 2010 and 2013 and the Core Components… CVSS 2.0MEDIUM 5.0
  • TI-2022-14751 Skype for Business and Lync Remote Code Execution Vulnerability CVSS 3.1HIGH 7.2
  • TI-2021-08239 Skype for Business and Lync Remote Code Execution Vulnerability CVSS 3.1HIGH 7.2
See all 15 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences