{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-105821","assignerOrgId":"f23511db-6c3e-4e32-a477-6aa17d310630","state":"PUBLISHED","assignerShortName":"TPLink","dateReserved":"2026-10-05T21:36:14.670Z","datePublished":"2026-11-03T19:41:03.841Z","dateUpdated":"2026-11-03T19:41:03.841Z"},"containers":{"cna":{"providerMetadata":{"orgId":"f23511db-6c3e-4e32-a477-6aa17d310630","shortName":"TPLink","dateUpdated":"2026-11-03T19:41:03.841Z"},"title":"Broken Access Control Leading to Cross-Device Token Issuance in Tapo Cloud MQTT Proxy","problemTypes":[{"descriptions":[{"lang":"en","cweId":"CWE-862","description":"CWE-862 Missing Authorization","type":"CWE"}]}],"impacts":[{"capecId":"CAPEC-1","descriptions":[{"lang":"en","value":"CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs"}]}],"affected":[{"vendor":"TP-Link Systems Inc.","product":"Tapo Cloud Service","modules":["MQTT Proxy"],"versions":[{"status":"affected","version":"0","lessThan":"N/A","versionType":"custom"}],"defaultStatus":"unaffected"}],"descriptions":[{"lang":"en","value":"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.","supportingMedia":[{"type":"text/html","base64":false,"value":"<p>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.</p>\n\n<p>Successful\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.&nbsp;</p>"}]}],"references":[{"url":"https://www.tp-link.com/us/support/faq/5370/","tags":["vendor-advisory"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","subConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH","subIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"HIGH","baseScore":8.3,"vectorString":"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"}}],"credits":[{"lang":"en","value":"davidsclee (davidleesecurity.co.uk)","type":"finder"}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 1.0.5"}}}}