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Vulnerability Summary

A command injection flaw exists through an authenticated Telnet connection. A successful exploit of this vulnerability could allow the attacker to establish a shell with elevated privileges.



CVE 2021-37145 – CX5500 Improper Neutralization of Special Elements used in an OS Command

The vulnerability is present due to the ability of commands passed through the authenticated Telnet connection allow OS command execution.  An attacker who exploits this vulnerability will be capable of establish a shell with elevated privileges.  


Last Update: 3/9/2022
Initial Public Release: 9/7/2021
Advisory ID:  PLYVC21-06

CVE ID: CVE-2021-37145
CVSS Score: 7.2

Product Affected

1.3.5 and prior

End of Support June 30, 2021

1.3.5 and prior

End of Support August 31, 2021

There is no solution, product is at the end of the support window.



Poly recommends applying the following methods to reduce the risk of the identified vulnerability.  If possible, it is recommended to disable the web UI, which can be accomplished on the device using the Admin credentials for the device.  It is also recommended to implement strong password complexity for the Admin account credentials.


Any customer using an affected system who is concerned about this vulnerability within their deployment should contact Poly Technical Support(888) 248-4143, (916) 928-7561, or visit the Poly Support Site.



Poly would like to thank Caleb Jaren and Brendan Saunders from Microsoft for reporting security vulnerabilities to us and for their coordinated disclosure.

Revision History
1.0 9/7/2021 Initial Release
2.0 3/9/2022 Format changes and Detail clarifications

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