This indicates an attack attempt to exploit a Filename Spoofing vulnerability in RARLAB WinRAR.
The vulnerability is due to an error when the vulnerable software handles a malformed ZIP file. A remote attacker can exploit this to bypass security checks of vulnerable systems and lead to the user opening a malicious executable file.
RARLAB WinRAR 3.80
RARLAB WinRAR 4.20
RARLAB WinRAR 5.01
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the most recent upgrade or patch from the vendor.