A computer-implemented method for managing access may include (1) identifying an attempt to perform, within a computing environment, an action that involves a specific entity, (2) determining that the attempted action is anomalous for the specific entity, (3) identifying a quota of allowed anomalous actions for the specific entity, (4) determining that the attempted action causes a count of anomalous actions to exceed the quota of allowed anomalous actions, and (5) performing a security action based on the determination that the attempted action causes the count of anomalous actions to exceed the quota of allowed anomalous actions. Various other methods, systems, and computer-readable media are also disclosed.