{"id":"CVE-2026-9770","aliases":["EUVD-2026-44576","GHSA-q3g3-7q7p-5jwv"],"status":"published","title":"Hardcoded Cryptographic Key Information Disclosure Vulnerability on TP-Link Kasa EC70 and EC71","description":"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","severity":{"version":"4.0","score":8.6,"vector":"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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00312,"percentile":0.24215,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-321"],"published":"2026-07-15T00:21:06Z","modified":"2026-08-06T18:31:32Z","products":[{"vendor":"tp-link","product":"kasa_ec70_firmware"},{"vendor":"tp-link","product":"kasa_ec71_firmware"},{"vendor":"tp-link systems inc.","product":"kasa ec70 v4"},{"vendor":"tp-link systems inc.","product":"kasa ec71 v4"}],"references":[{"url":"https://www.tp-link.com/en/support/download/ec71/v4/#Firmware-Release-Notes","tags":["patch","Release Notes"]},{"url":"https://www.tp-link.com/us/support/download/ec71/v4/#Firmware-Release-Notes","tags":["patch","Release Notes"]},{"url":"https://www.tp-link.com/us/support/download/ec70/v4/#Firmware-Release-Notes","tags":["patch","Release Notes"]},{"url":"https://www.tp-link.com/en/support/download/ec70/v4/#Firmware-Release-Notes","tags":["patch","Release Notes"]},{"url":"https://www.tp-link.com/us/support/faq/5192/","tags":["vendor-advisory","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-9770"},{"url":"https://www.tp-link.com/us/support/faq/5192"},{"url":"https://github.com/advisories/GHSA-q3g3-7q7p-5jwv"}],"sources":{"cve":[{"id":"CVE-2026-9770","title":"Hardcoded Cryptographic Key Information Disclosure Vulnerability on TP-Link Kasa EC70 and EC71","description":"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","status":"published","published":"2026-07-15T00:21:06.126Z","modified":"2026-07-15T12:38:03.18Z","cvss":[{"version":"4.0","score":8.6,"vector":"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","level":"high","assessor":"cna"}],"cwes":["CWE-321"],"updated_at":"2026-11-02T13:42:37.965383Z"}],"euvd":[{"id":"EUVD-2026-44576","description":"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","status":"published","published":"2026-07-15T00:21:06Z","modified":"2026-07-15T12:38:03Z","cvss":[{"version":"4.0","score":8.6,"vector":"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","level":"high"}],"updated_at":"2026-11-02T18:19:53.678292Z"}],"ghsa":[{"id":"GHSA-q3g3-7q7p-5jwv","title":"Kasa EC71 v4 and EC70 v4 firmware contains a static cryptographic private key stored in a read...","description":"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","status":"published","published":"2026-07-15T03:32:51Z","modified":"2026-08-06T18:31:32Z","cvss":[{"version":"4.0","score":8.6,"vector":"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","level":"high"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-321"],"updated_at":"2026-11-02T15:10:10.387883Z"}],"nvd":[{"id":"CVE-2026-9770","description":"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","status":"published","published":"2026-07-15T01:17:10.387Z","modified":"2026-08-06T18:20:49.317Z","cvss":[{"version":"4.0","score":8.6,"vector":"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","level":"high","assessor":"secondary"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-321"],"updated_at":"2026-11-02T14:12:29.879716Z"}]}}