Bing found the following results
What Is Universal Plug And Play (UPnP)? - Lifewire
Universal Plug and Play - Wikipedia
How to Enable UPnP in Windows - Computer Hope
Universal Plug and Play (UPnP) - GeeksforGeeks
Universal Plug and Play (UPnP) - TechTarget
What is UPnP? | NordVPN
What is UPnP (Universal Plug and Play)? - phoenixNAP
What is UPnP? Yes, It's Still Dangerous in 2024 | UpGuard
Overview of UPnP Architecture - Win32 apps | Microsoft Learn
What Is UPnP? Understanding Network Protocols By WireX Systems