An upgrade path is the supported route from one software version to another. It defines which source versions can move to which target versions, and what steps, checks, or prerequisites are required along the way. In operating systems and enterprise software, a clear upgrade path helps ensure that updates preserve compatibility and do not break services.
In cyber security, upgrade paths matter because unsupported or skipped versions often stop receiving security fixes. Attackers frequently target systems that lag behind a supported path, since old releases may contain known vulnerabilities, weaker defaults, or tooling gaps. Defenders use upgrade paths to plan safe maintenance, test application compatibility, and stage rollback options before changing production systems. In practice, a release like a new Ubuntu LTS point update opens a formal path that administrators can use to move fleets forward while keeping them inside support.