CVE-2026-2541 Details

A vulnerability exists in the Micca KE700 car alarm system, allowing attackers to predict the next valid rolling code used for authentication. The issue arises because the system relies on a 6-bit portion of an identifier for rolling code authentication, creating only 64 possible combinations. This low entropy enables brute-force attacks against the rolling code component. Exploitation of this vulnerability could lead to unauthorized access to the vehicle by allowing an attacker to unlock it without needing a future signal from the legitimate key fob.

To address this vulnerability, it is recommended to increase the entropy of the rolling code by using a larger random component. A minimum of 64 bits of entropy is suggested to make brute-force attacks computationally infeasible. Additionally, the system should be redesigned to use a standard, publicly vetted rolling code protocol, such as KeeLoq or an AES-based equivalent.