A patch engine is a specialized software component designed to modify existing code, either in memory or on disk, according to predefined rules or patterns. Its primary function is to apply updates, fixes, or enhancements to software without requiring a full reinstallation or manual intervention. Patch engines are commonly used in cybersecurity to quickly address vulnerabilities, improve system stability, or adapt software to new requirements. They analyze code, identify areas needing modification, and implement changes automatically. By streamlining the patching process, patch engines help organizations maintain secure and up-to-date systems, reducing the risk of exploitation by attackers targeting unpatched vulnerabilities.