Inheritance is a permission mechanism in which a folder or file automatically receives access rules from its parent object unless those rules are changed or blocked. In Windows and similar systems, inherited permissions can come from a parent folder, a share, or a group-based policy. This makes administration easier because security teams can set access once and have it apply consistently to many child objects.
In cyber security, inheritance matters because it can quietly expand access. A sensitive subfolder may appear protected, but inherited rights can still grant read, write, or modify access through the parent. Attackers and insiders often benefit from this when overbroad parent permissions or stale group memberships give them more access than intended. Defenders review effective permissions, not just explicit ones, to find risky inheritance paths, remove unnecessary rights, and use breaking inheritance only when a folder needs tighter control.