{"id":"CVE-2026-105821","aliases":["EUVD-2026-116270","GHSA-w8wf-fr39-3c38"],"status":"published","title":"Broken Access Control Leading to Cross-Device Token Issuance in Tapo Cloud MQTT Proxy","description":"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 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.","severity":{"version":"4.0","score":8.3,"vector":"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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00239,"percentile":0.15173,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-862"],"published":"2026-11-03T19:41:03Z","modified":"2026-11-03T21:32:21Z","products":[{"vendor":"tp-link systems inc.","product":"tapo cloud service"}],"references":[{"url":"https://www.tp-link.com/us/support/faq/5370/","tags":["vendor-advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-105821"},{"url":"https://www.tp-link.com/us/support/faq/5370"},{"url":"https://github.com/advisories/GHSA-w8wf-fr39-3c38"}],"sources":{"cve":[{"id":"CVE-2026-105821","title":"Broken Access Control Leading to Cross-Device Token Issuance in Tapo Cloud MQTT Proxy","description":"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 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.","status":"published","published":"2026-11-03T19:41:03.841Z","modified":"2026-11-06T19:51:09.933Z","cvss":[{"version":"4.0","score":8.3,"vector":"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","level":"high","assessor":"cna"}],"cwes":["CWE-862"],"updated_at":"2026-11-06T20:30:03.598374Z"}],"euvd":[{"id":"EUVD-2026-116270","description":"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 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.","status":"published","published":"2026-11-03T19:41:03Z","modified":"2026-11-06T19:51:09Z","cvss":[{"version":"4.0","score":8.3,"vector":"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","level":"high"}],"updated_at":"2026-11-06T21:07:00.111123Z"}],"ghsa":[{"id":"GHSA-w8wf-fr39-3c38","title":"The Tapo\nCloud MQTT broker contains a broken access control vulnerability in a proxy\ntopic used...","description":"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 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.","status":"published","published":"2026-11-03T21:32:13Z","modified":"2026-11-03T21:32:21Z","cvss":[{"version":"4.0","score":8.3,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"}],"cwes":["CWE-862"],"updated_at":"2026-11-03T21:34:06.482208Z"}],"nvd":[{"id":"CVE-2026-105821","description":"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 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.","status":"published","published":"2026-11-03T20:18:05.987Z","modified":"2026-11-06T21:15:29.947Z","cvss":[{"version":"4.0","score":8.3,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"}],"cwes":["CWE-862"],"updated_at":"2026-11-06T22:02:16.475328Z"}]}}