UPnP is convenient but dangerous. Log into your router and turn off UPnP. Then, manually set up port forwarding only if absolutely necessary.
While not inherent to the string, the link= parameter in some firmware versions accepts unsanitized input, leading to: inurl viewerframe mode motion network camera link
As awareness of these vulnerabilities grew, changes occurred: UPnP is convenient but dangerous
: An IP camera that transmits data over a Fast Ethernet or Wi-Fi connection 2. Core Features of These Cameras inurl viewerframe mode motion network camera link