Mal/JavaCmC-A is a malware infection that is a part of a Python-based malware attack that aims at both Mac and Windows PCs. Mal/JavaCmC-A exploits the Java security vulnerability for downloading further malicious code onto the corrupted machines. The infectious Java code then downloads further code onto the affected PC user's computer, according to which type of the OS he/she is running. Online computer users who visit attacked websites may get infected via a Java exploit that downloads harmful programs onto their PCs. You need to delete Mal/JavaCmC-A immediately after detection before it harms your computer.