> TVE-2026-01: Xiaomi miIO Protocol Authentication Bypass

An attacker sending malformed miIO messages over WiFi to a Xiaomi Smart camera device can trigger the vulnerability described here. This report describes a secure protocol design issue, which leads to authentication bypass in the proprietary Xiaomi miIO protocol. The vulnerability described in this advisory affects a potentially wide range of Xiaomi Smart devices. This vulnerability has not yet been issued a public patch or advisory or assigned a CVE by the vendor despite repeated requests and a lapse of more than six months since the original vendor disclosure. Vulnerability Details For packets received in UDP port 54321, the miio_client binary verifies the MAC and then decrypts the received packet.