"Debonder" available for CA glues is typically acetone-based. It takes a while for it to soften though. We used to keep the detachable applicator tips for our CA bottles in a jar of acetone so they were always clog-free.
However, you mentioned "superglued or epoxied." If it's epoxy, I don't think anything but heat will soften it. A heat gun or possibly hot oil as applied in a stock bending procedure would do it. When it gets hot enough to fail it usually crumbles.
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