Tecmint: In Linux, hard and soft links are referenced to files, which are very important, if not protected very well, any vulnerabilities in them can be exploited by malicious system users or attackers.
A common vulnerability is the symlink race. It is a security vulnerability in software, that comes about when a program insecurely creates files (especially temporary files), and a malicious system user can create a symbolic (soft) link to such a file.