{"id":"CVE-2026-105821","title":"Broken Access Control Leading to Cross-Device Token Issuance in Tapo Cloud MQTT Proxy","summary":"The Tapo\nCloud MQTT broker contains a broken access control vulnerability in a proxy\ntopic used by authenticated Tapo devices to request service tokens. The broker\ndoes not verify that the device ID supplied in a proxy request belongs to…","severity":"high","cvss":8.3,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N","cvssSource":"cna","cwe":["CWE-862"],"vendor":"TP-Link Systems Inc.","product":"Tapo Cloud Service","affected":["tapo_cloud_service < N/A"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-06T19:50:54.166983Z"},"published":"2026-11-03","updated":"2026-11-06","sourceUpdated":"2026-11-06T19:51:09.933Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-105821","references":[{"url":"https://www.tp-link.com/us/support/faq/5370/"}],"tags":["cve.org"],"epss":0.00239,"epssPercentile":0.15114,"ingestedAt":"2026-11-05T20:33:06.400Z","slug":"CVE-2026-105821","body":"## Overview\n\nThe Tapo\nCloud MQTT broker contains a broken access control vulnerability in a proxy\ntopic used by authenticated Tapo devices to request service tokens. The broker\ndoes not verify that the device ID supplied in a proxy request belongs to the\nauthenticated device. An attacker who owns a Tapo device and knows another\ndevice's ID may obtain a device token scoped to the target device and use it to\nupload attacker-controlled content to the target user's Tapo Cloud storage. The\ncontent may then be presented in the Tapo app as a legitimate event.\n\n\n\n\n\nSuccessful\nexploitation may allow an attacker to upload attacker-controlled content that\nis presented to a target user as a legitimate Tapo event, retrieve internal\nservice information through crafted proxy requests, or abuse Tapo Cloud\noutbound request capability in activity that could affect service\navailability.\n\n## Affected\n\n- `tapo_cloud_service < N/A`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":46,"depthScoreParts":{"impact":45.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}