27 Jun 2025

Keysight’s Application and Threat Intelligence (ATI) research team has uncovered a novel Transport Layer Security (TLS) handshake exploit that uses protocol-compliant behaviour to evade traditional network defenses.

This newly discovered covert channel allows attackers to manipulate TLS handshake packets by simply rearranging parameter settings, without injecting malicious code, making detection by firewalls and intrusion prevention systems nearly impossible.