Kasa EC71 v4 and EC70 v4 firmware contains a static cryptographic private key stored in a read-only filesystem\nthat is shared across devices. An\nattacker with access to the firmware image can extract the embedded key.
\n\n
Successful\nexploitation may allow an unauthenticated attacker on the same network to use\nthis key in the web management service, compromising the confidentiality of\nencrypted communications. This may enable passive decryption of traffic or\nactive man-in-the-middle (MITM) attacks
"}],"value":"Kasa EC71 v4 and EC70 v4 firmware contains a static cryptographic private key stored in a read-only filesystem\nthat is shared across devices. An\nattacker with access to the firmware image can extract the embedded key. \n\n\n\n\n\n\n\n\n\nSuccessful\nexploitation may allow an unauthenticated attacker on the same network to use\nthis key in the web management service, compromising the confidentiality of\nencrypted communications. This may enable passive decryption of traffic or\nactive man-in-the-middle (MITM) attacks"}],"impacts":[{"capecId":"CAPEC-474","descriptions":[{"lang":"en","value":"CAPEC-474 Signature Spoofing by Key Theft"}]}],"metrics":[{"cvssV4_0":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"ADJACENT","baseScore":8.6,"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:H/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnerabilityResponseEffort":"NOT_DEFINED"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-321","description":"CWE-321 Use of hard-coded cryptographic key","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-07-15T00:21:06.126Z","orgId":"f23511db-6c3e-4e32-a477-6aa17d310630","shortName":"TPLink"},"references":[{"tags":["patch"],"url":"https://www.tp-link.com/en/support/download/ec71/v4/#Firmware-Release-Notes"},{"tags":["patch"],"url":"https://www.tp-link.com/us/support/download/ec71/v4/#Firmware-Release-Notes"},{"tags":["patch"],"url":"https://www.tp-link.com/us/support/download/ec70/v4/#Firmware-Release-Notes"},{"tags":["patch"],"url":"https://www.tp-link.com/en/support/download/ec70/v4/#Firmware-Release-Notes"},{"tags":["vendor-advisory"],"url":"https://www.tp-link.com/us/support/faq/5192/"}],"source":{"discovery":"UNKNOWN"},"title":"Hardcoded Cryptographic Key Information Disclosure Vulnerability on TP-Link Kasa EC70 and EC71","x_generator":{"engine":"Vulnogram 1.0.2"}}},"cveMetadata":{"assignerOrgId":"f23511db-6c3e-4e32-a477-6aa17d310630","assignerShortName":"TPLink","cveId":"CVE-2026-9770","datePublished":"2026-07-15T00:21:06.126Z","dateReserved":"2026-05-27T22:00:46.491Z","dateUpdated":"2026-07-15T12:38:03.180Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-15 01:17:10","lastModifiedDate":"2026-07-15 20:08:02","problem_types":["CWE-321","CWE-321 CWE-321 Use of hard-coded cryptographic key"],"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:H/VI:H/VA:N/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":8.6,"baseSeverity":"HIGH","attackVector":"ADJACENT","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"NONE","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":"2026-07-15T12:37:44.275721Z","id":"CVE-2026-9770","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"9770","Ordinal":"1","Title":"Hardcoded Cryptographic Key Information Disclosure Vulnerability","CVE":"CVE-2026-9770","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"9770","Ordinal":"1","NoteData":"Kasa EC71 v4 and EC70 v4 firmware contains a static cryptographic private key stored in a read-only filesystem\nthat is shared across devices. An\nattacker with access to the firmware image can extract the embedded key. \n\n\n\n\n\n\n\n\n\nSuccessful\nexploitation may allow an unauthenticated attacker on the same network to use\nthis key in the web management service, compromising the confidentiality of\nencrypted communications. This may enable passive decryption of traffic or\nactive man-in-the-middle (MITM) attacks","Type":"Description","Title":"Hardcoded Cryptographic Key Information Disclosure Vulnerability"}]}}}