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Vulnerability Intelligence Report
Skype for Business and Lync Server Denial of Service Vulnerability

CVE-2019-1029

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.

No Active Exploit Signals
CVSS Base Score
5.9
MEDIUM
EPSS Probability:5.28%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
Authentication
Weaponization
SSVC Action

Affected Products & Versions

Vendor Product Affected Versions
Microsoft Microsoft Lync Server 2010 0 < publication (affected)
Microsoft Microsoft Lync Server 2013 0 < publication (affected)

References & Technical Advisories

No reference links found.

Threat Intelligence Signals

EPSS Score
5.281%

Identity & Timeline

StatusPUBLISHED
Assigning AuthorityMicrosoft Corporation · Vendor · USA
Reserved2018-11-26T00:00:00
Published2019-06-12T13:49:40
Patch Date2019-06-11
Last Updated2025-05-20T17:49:45

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