RARLAB

CVE-2026-14191 describes an out-of-bounds heap write vulnerability in WinRAR and UnRAR when processing RAR5 recovery volumes (.rev), allowing an unauthenticated attacker to achieve remote code execution on a victim's system by tricking a user into opening a specially crafted archive.

This rule detects attempts to execute Jscript/Vbscript files from archive files, a common method for delivering malicious scripts by identifying unusual parent-child process relationships where scripting utilities are launched from archive programs, indicating potential exploitation.