Cisco Webex Centers CVE-2020-3116 Denial of Service Vulnerability



Date Discovered

January 8, 2020


Cisco Webex Centers is prone to a denial-of-service vulnerability. An attacker can exploit this issue to cause a denial-of-service condition. This issue is being tracked by Cisco Bug IDs CSCvr16379, CSCvr16383 and CSCvr16386.

Technologies Affected

  • Cisco WebEx Event Center
  • Cisco WebEx Meeting Center
  • Cisco WebEx Training Center
  • Cisco Webex Support Center


Permit local access for trusted individuals only. Where possible, use restricted environments and restricted shells.
Allow only trusted individuals to have user accounts and local access to the resources.

Block external access at the network boundary, unless external parties require service.
If global access isn't needed, filter access to the affected computer at the network boundary. Restricting access to only trusted computers and networks might greatly reduce the likelihood of successful exploits.

Updates are available. Please see the references or vendor advisory for more information.



Wen Guang Jiao of Qihoo 360 Core Security

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