An unmaintained dependency is typically an open source project that has been abandoned, or receives very infrequent updates. This becomes a problem as the code becomes incompatible with newer versions of other dependencies. Unmaintained dependencies also become a security risk as no fixes are issued to vulnerabilities.
Eliminate potential risk by detecting if your software is unsupported or non maintained by the open source community. This gives you the tools to decide if dependencies should be removed, maintained internally, or replaced.