Independent Replication of CVE‑2026‑0073: A Study in ADB Protocol Authentication Bypass
Abstract This report documents the independent re‑implementation of an exploit for CVE‑2026‑0073, a critical authentication bypass in the Android Debug Bridge daemon ( adbd ). The vulnerability arises from a type‑confusion error in the comparison of TLS client certificate public keys, enabling an unauthenticated network peer to obtain an ADB shell. The goal of this work was not to produce a novel attack, but to achieve a deep, practical understanding of the vulnerability through hands‑on reproduction on a physical device. We describe the ADB‑over‑TLS protocol, the logical defect in adbd_tls_verify_cert() , and the practical challenges encountered when targeting a Samsung Galaxy A22 (SM‑A225F). My experience highlights the gap between theoretical vulnerability descriptions and the engineering demands of real‑world exploit development, underscoring the value of independent replication in security research. 1. Introduction On 5 May 2026, the Android Security Bulletin disclo...
