CVE-2021-26421: Skype for Business and Lync Spoofing Vulnerability

Overview

Severity

Medium (CVSS 6.5)

CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:L/A:N/E:U/RL:O/RC:C

Category

Spoofing

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2021-May

Released

2021-05-11

EPSS Score

1.67% (percentile: 82.1%)

Affected Products (2)

Microsoft Office

• Skype for Business Server 2015 CU11
• Microsoft Lync Server 2013 CU10

Security Updates (2)

• 5003729
• 5003729

Acknowledgments

Suresh Chelladurai

Revision History

• 2021-05-11: Information published.