An improper input\nvalidation vulnerability in the configuration service for processing encrypted\ncredential data has been identified in Tapo C200 v5. An attacker can send oversized crypted\nciphertext values that may trigger exception handling failures, due to insufficient\nvalidation, causing the affected device to crash or restart.
\n\nSuccessful\nexploitation may temporarily disrupt HTTPS management and monitoring\nfunctionality, resulting in a denial-of-service (DoS) condition until the\nservice recovers.
"}],"value":"An improper input\nvalidation vulnerability in the configuration service for processing encrypted\ncredential data has been identified in Tapo C200 v5. An attacker can send oversized crypted\nciphertext values that may trigger exception handling failures, due to insufficient\nvalidation, causing the affected device to crash or restart.\n\n\n\n\n\nSuccessful\nexploitation may temporarily disrupt HTTPS management and monitoring\nfunctionality, resulting in a denial-of-service (DoS) condition until the\nservice recovers."}],"impacts":[{"capecId":"CAPEC-24","descriptions":[{"lang":"en","value":"CAPEC-24 Filter Failure through Buffer Overflow"}]}],"metrics":[{"cvssV4_0":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"ADJACENT","baseScore":7.1,"baseSeverity":"HIGH","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnerabilityResponseEffort":"NOT_DEFINED"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-20","description":"CWE-20 Improper input validation","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-08-18T21:25:11.118Z","orgId":"f23511db-6c3e-4e32-a477-6aa17d310630","shortName":"TPLink"},"references":[{"tags":["patch"],"url":"https://www.tp-link.com/us/support/download/tapo-c200/v5/"},{"tags":["patch"],"url":"https://www.tp-link.com/en/support/download/tapo-c200/v5/"},{"tags":["vendor-advisory"],"url":"https://www.tp-link.com/us/support/faq/5248/"}],"source":{"discovery":"UNKNOWN"},"title":"Denial-of-Service via Oversized Encrypted Credential Input in TP-Link Tapo C200","x_generator":{"engine":"Vulnogram 1.0.4"}}},"cveMetadata":{"assignerOrgId":"f23511db-6c3e-4e32-a477-6aa17d310630","assignerShortName":"TPLink","cveId":"CVE-2026-15316","datePublished":"2026-08-18T21:25:11.118Z","dateReserved":"2026-07-09T17:55:11.713Z","dateUpdated":"2026-08-20T15:36:48.337Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-18 22:16:49","lastModifiedDate":"2026-08-20 16:17:08","problem_types":["CWE-20","CWE-20 CWE-20 Improper input validation"],"metrics":{"cvssMetricV40":[{"source":"f23511db-6c3e-4e32-a477-6aa17d310630","type":"Secondary","cvssData":{"version":"4.0","vectorString":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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","baseScore":7.1,"baseSeverity":"HIGH","attackVector":"ADJACENT","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED"}}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-08-20T13:31:45.040163Z","id":"CVE-2026-15316","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"15316","Ordinal":"1","Title":"Denial-of-Service via Oversized Encrypted Credential Input in TP","CVE":"CVE-2026-15316","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"15316","Ordinal":"1","NoteData":"An improper input\nvalidation vulnerability in the configuration service for processing encrypted\ncredential data has been identified in Tapo C200 v5. An attacker can send oversized crypted\nciphertext values that may trigger exception handling failures, due to insufficient\nvalidation, causing the affected device to crash or restart.\n\n\n\n\n\nSuccessful\nexploitation may temporarily disrupt HTTPS management and monitoring\nfunctionality, resulting in a denial-of-service (DoS) condition until the\nservice recovers.","Type":"Description","Title":"Denial-of-Service via Oversized Encrypted Credential Input in TP"}]}}}