Options → Settings → Integration → “Allow extraction of ACE archives” (unchecked by default) Even with 5.61, avoid re-enabling ACE support. The DLL is unmaintained. :: Basic RAR5 compression with 32-bit efficiency rar32.exe a -m5 -md256m -s backup.rar C:\data\ :: Test archive integrity rar32.exe t damaged.rar
❌ – Working with multi-gigabyte solid archives, encrypted RAR5 with large dictionaries, or need maximum performance on modern hardware. 6. Security Note (Important) Do not use WinRAR versions older than 5.61 (i.e., 5.60 or earlier) if you ever open .ace or untrusted .rar files from the internet. The path traversal vulnerability in unacev2.dll is trivially exploitable. Version 5.61 disables ACE support by default – you can verify this by checking: winrar 5.61 -32-bit-
Note: The 32-bit executable ( rar32.exe ) is installed alongside rar.exe (which launches appropriate bitness based on OS). To force 32-bit, call rar32.exe explicitly. WinRAR 5.61 32-bit is a rock-solid, security-patched archival tool for legacy Windows environments. It strips out the dangerous ACE support, fixes several GUI crashes, and offers nearly all features of the 64-bit version except extreme memory dictionary sizes. For modern systems, you should use WinRAR 6.x 64-bit – but if you're stuck on 32-bit XP/7 or maintaining cross-32-bit compatibility, 5.61 is the final truly stable release before the 6.x feature overhaul. Options → Settings → Integration → “Allow extraction
9/10 for stability, 6/10 for modern security (due to disabled ACE), 8/10 for performance relative to hardware limits. Recommended only for 32-bit legacy hosts. Version 5