{"schemaVersion":3,"id":"CVE-2020-23539","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"An issue was discovered in Realtek rtl8723de BLE Stack <= 4.1 that allows remote attackers to cause a Denial of Service via the interval field to the CONNECT_REQ message.","dates":{"published":"2021-04-08T16:45:38.000Z","modified":"2024-08-04T14:58:14.989Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.8,"severity":"high","version":"2.0","versionLabel":"v2.0","source":"NVD","vector":"AV:N/AC:L/Au:N/C:N/I:N/A:C","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":7.8,"severity":"high","vector":"AV:N/AC:L/Au:N/C:N/I:N/A:C","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.01787,"percentile":0.78024,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.01787},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.01787,"percentile":0.78024}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01787,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.01787,"percentile":0.78024}]},"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":"GITHUB_POKERFACETT_MY_REQUEST","name":"My Request","source":"github","url":"https://github.com/pokerfacett/MY_REQUEST/blob/df73fe140655ea44542b03ac186e6c2b47e97540/Realtek%208723ds%20BLE%20SDK%20denial%20of%20service%20attack.md","maturity":"poc","reliabilityScore":0.3,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null}],"exploitCount":1,"weaknesses":[{"id":"CWE-476","name":"NULL Pointer Dereference","description":"The product dereferences a pointer that it expects to be valid but is NULL.","type":"weakness","status":"Stable","abstraction":"Base","likelihoodOfExploit":"Medium","url":"https://cwe.mitre.org/data/definitions/476.html"}],"affected":[{"vendor":"realtek","product":"rtl8723de_firmware","name":"rtl8723de firmware","label":"rtl8723de_firmware","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"≤ 4.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"≤ 4.1","eol":null,"hubHref":"/vendor/realtek/rtl8723de"}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/pokerfacett/MY_REQUEST/blob/df73fe140655ea44542b03ac186e6c2b47e97540/Realtek%208723ds%20BLE%20SDK%20denial%20of%20service%20attack.md","label":"github.com/pokerfacett/…","hostname":"github.com","tags":["X Refsource MISC","Exploit","Third Party Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2021-04-08T16:45:38.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-04T14:58:14.989Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":42,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T05:38:44.537Z","stale":false,"partial":false}}