> TVE-2026-05: TP-Link offline password bruteforce

An attacker sending malformed requests over LAN to a TP-Link Smart camera device can trigger the vulnerability described here. This report describes a cryptographic design vulnerability, which enables offline password bruteforce, which may leads to TAPO cloud account compromise. The vulnerability we are disclosing in this advisory affects a wide range of TP-Link devices, including TAPO Smart Cameras. A TP-Link Security Advisory has not yet been released for this vulnerability. Vulnerability Details The following diagram summarizes the TAPO camera authentication procedure: First, the client queries the acn, then calculates the digest password the following way: H(cnonce + H(pw) + acn) + acn + cnonce The device_confirm value contains the hashed password to prove the identity of the device to the app (or other party), as follows: H(cnonce + H(pw) + acn) + acn + cnonce = device_confirm.