Does it a design flaw or it is a ………..?

While exploring her new home, a girl named Coraline discovers a secret door, behind which lies an alternate world that closely mirrors her own but,…..

Remediation announcement – Cisco Video Surveillance Manager Appliance Default Password Vulnerability – 2018 September 21 (below url for reference)

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180921-vsm

Similar vulnerability found on Cisco products within this year, is it a coincidence? (see below):

CVE-2018-0150 – Cisco IOS XE static credential default account
CVE-2018-0222 – Digital Network Architecture Center Static Credentials Vulnerability
CVE-2018-0268 – bypass for a Kubernetes container management subsystem embedded inside Cisco’s DNA Center.
CVE-2018-0271 – An authentication bypass in the DNA Center’s API gateway.
CVE-2018-0375 – vulnerability in the Cluster Manager of Cisco Policy Suite
CVE-2018-0329 – The hardcoded credentials resides in the read-only SNMP community string in the configuration file of the SNMP daemon,
CVE-2018-15427 – Cisco Video Surveillance Manager Appliance Default Password Vulnerability