Using an outdated WinRAR (pre-6.0) is unsafe. Using unrar on a hardened Linux server is generally safe. The binary matters more than the format.
To minimize the risks associated with RAR files, follow these best practices: are rar files safe
RAR provides optional encryption, but safety depends on the version. Using an outdated WinRAR (pre-6
The primary danger of a RAR file is its ability to hide malicious code from initial detection. are rar files safe