{"schemaVersion":3,"id":"CVE-2020-16630","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"TI’s BLE stack caches and reuses the LTK’s property for a bonded mobile. A LTK can be an unauthenticated-and-no-MITM-protection key created by Just Works or an authenticated-and-MITM-protection key created by Passkey Entry, Numeric Comparison or OOB. Assume that a victim mobile uses secure pairing to pair with a victim BLE device based on TI chips and generate an authenticated-and-MITM-protection LTK. If a fake mobile with the victim mobile’s MAC address uses Just Works and pairs with the victim device, the generated LTK still has the property of authenticated-and-MITM-protection. Therefore, the fake mobile can access attributes with the authenticated read/write permission.","dates":{"published":"2021-09-20T19:20:50.000Z","modified":"2024-08-04T13:45:33.225Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":6.8,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":6.8,"severity":"medium","vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":4.3,"severity":"medium","vector":"AV:A/AC:M/Au:N/C:P/I:P/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00689,"percentile":0.51867,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.00689},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00689,"percentile":0.51867}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00689,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00689,"percentile":0.51867}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[{"id":"REF_E2E866C169BEB274","name":"Exploit Reference (usenix.org)","source":"reference","url":"https://www.usenix.org/system/files/sec20-zhang-yue.pdf","maturity":"unknown","reliabilityScore":0.2,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null}],"exploitCount":1,"weaknesses":[{"id":"CWE-863","name":"Incorrect Authorization","description":"The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.","type":"weakness","status":"Incomplete","abstraction":"Class","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/863.html"}],"affected":[{"vendor":"ti","product":"15.4-stack","name":"15.4-stack","label":"15.4-stack","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"na","noFixRecorded":false,"fixedIn":null}],"versionsText":"na","eol":null,"hubHref":"/vendor/ti/154-stack"},{"vendor":"ti","product":"ble5-stack","name":"ble5-stack","label":"ble5-stack","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"na","noFixRecorded":false,"fixedIn":null}],"versionsText":"na","eol":null,"hubHref":"/vendor/ti/ble5-stack"},{"vendor":"ti","product":"dynamic_multi-protocal_manager","name":"dynamic multi-protocal manager","label":"dynamic_multi-protocal_manager","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"na","noFixRecorded":false,"fixedIn":null}],"versionsText":"na","eol":null,"hubHref":"/vendor/ti/dynamic_multi-protocal_manager"},{"vendor":"ti","product":"easylink","name":"easylink","label":"easylink","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"na","noFixRecorded":false,"fixedIn":null}],"versionsText":"na","eol":null,"hubHref":"/vendor/ti/easylink"},{"vendor":"ti","product":"openthread","name":"openthread","label":"openthread","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"na","noFixRecorded":false,"fixedIn":null}],"versionsText":"na","eol":null,"hubHref":"/vendor/ti/openthread"},{"vendor":"ti","product":"real-time_operating_system","name":"real-time operating system","label":"real-time_operating_system","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"na","noFixRecorded":false,"fixedIn":null}],"versionsText":"na","eol":null,"hubHref":"/vendor/ti/real-time_operating_system"},{"vendor":"ti","product":"z-stack","name":"z-stack","label":"z-stack","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"na","noFixRecorded":false,"fixedIn":null}],"versionsText":"na","eol":null,"hubHref":"/vendor/ti/z-stack"}],"affectedCount":7,"eol":{"hasEol":false,"count":0},"references":[{"url":"http://software-dl.ti.com/simplelink/esd/simplelink_cc13x2_26x2_sdk/3.20.00.68/exports/changelog.html","label":"software-dl.ti.com/simplelink/esd/simplelink_cc13x2_26x2_sdk/3.20.00.68/exports/changelog.html","hostname":"software-dl.ti.com","tags":["X Refsource MISC","Vendor Advisory"]},{"url":"https://www.usenix.org/system/files/sec20-zhang-yue.pdf","label":"www.usenix.org/system/files/sec20-zhang-yue.pdf","hostname":"www.usenix.org","tags":["X Refsource MISC","Exploit","Third Party Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2021-09-20T19:20:50.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-04T13:45:33.225Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":37,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T00:09:56.035Z","stale":false,"partial":false}}