Use After Free
The tfo_common component in HwordApp.dll in Hancom Office 184.108.40.20634 allows a use-after-free via a crafted .docx file.
CWE-416 - Use After Free
Use-after-free (UaF) vulnerability occurs when the application is using a pointer to memory that has been freed. Any attempt to read/write to a buffer after it is de-allocated allows memory corruption, sensitive information exposure, and can potentially lead to arbitrary code execution.