。
She takes advantage of every situation.
Literal
She [topic-は] all circumstances [object-を] makes-use-of.
事情 ('circumstances / situation / state of affairs') is the broad noun for the surrounding context — anything from the reasons behind an event to the practical conditions of a moment. 利用する ('use / make use of / take advantage of') can be neutral (借りる本を利用する 'make use of borrowed books') or pejorative (人を利用する 'use people'); paired with すべての ('every'), the sentence leans pejorative — calculating, opportunistic. The plain non-past expresses habitual behavior.