Remote code execution in Microsoft Skype for Business and Lync

Published: 2022-07-12
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2022-33633
Exploitation vector Network
Public exploit N/A
Vulnerable software
Skype for Business Server
Server applications / Conferencing, Collaboration and VoIP solutions

Lync Server
Server applications / Other server solutions

Vendor Microsoft

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Input validation error

EUVDB-ID: #VU65212

Risk: Low


CVE-ID: CVE-2022-33633

CWE-ID: CWE-20 - Improper Input Validation

Exploit availability: No


The vulnerability allows a remote user to execute arbitrary code on the system.

The vulnerability exists due to insufficient validation of user-supplied input in Skype for Business and Lync. A remote administrator can pass specially crafted input to the application and execute arbitrary code on the target system.


Install updates from vendor's website.

Vulnerable software versions

Skype for Business Server: 2015 CU12 - 2019 CU6

Lync Server: 2013 CU10

CPE2.3 External links

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?