In many contexts, files named similarly to this are designed to modify the MSO.DLL file—a core dynamic link library that handles Office licensing and validation. By altering this file, users attempt to bypass the requirement for a legitimate product key, effectively pirating the software.
Therefore, most likely refers to a targeted hotfix or security update for the core shared components of Microsoft Office 2013, bringing the MSO build to version 15.0.11.2 (or similar formatting) . Mso15.11.2patch
Using unauthorized patches like Mso15.11.2patch carries significant risks: In many contexts, files named similarly to this