CVE-2021-24099

Skype for Business and Lync Denial of Service Vulnerability

Description

Skype for Business and Lync Denial of Service Vulnerability

6.5

CVSS

Severity: Medium

CVSS 3.1 •

CVSS 2.0 •

EPSS 3.15% Top 15%

Vendor Advisory microsoft.com

Affected: Microsoft Skype for Business Server 2019 CU2

Affected: Microsoft Skype for Business Server 2015 CU 8

Affected: Microsoft Microsoft Lync Server 2013

References

Link	Tags
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-24099	patch vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-24099?: CVE-2021-24099 has been scored as a medium severity vulnerability.
How to fix CVE-2021-24099?: To fix CVE-2021-24099, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-24099 being actively exploited in the wild?: It is possible that CVE-2021-24099 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~3% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-24099?: CVE-2021-24099 affects Microsoft Skype for Business Server 2019 CU2, Microsoft Skype for Business Server 2015 CU 8, Microsoft Microsoft Lync Server 2013.

This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.