Access Windows admin share from Android? I have tested several Android apps and none of them seem to be able to do what I want.

How do I access admin shares such as \\host\c$ from Android?

Note that admin share access is enabled on the host and I can in fact access it from another Windows machine. Last time I checked it even works from Debian Linux. Now, Android either has some deeply rooted issues with this or it lacks the proper tools/apps.
Try ES File Explorer. It can access user shared folders + administrative shares.