{"schemaVersion":3,"id":"CVE-2026-4346","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"The vulnerability affecting TL-WR850N v3 allows cleartext storage of administrative and Wi-Fi credentials in a region of the device’s flash memory while the serial interface remains enabled and protected by weak authentication.  An attacker with physical access and the ability to connect to the serial port can recover sensitive information, including the router’s management password and wireless network key.\n\nSuccessful exploitation can lead to full administrative control of the device and unauthorized access to the associated wireless network.","dates":{"published":"2026-03-26T21:16:44.860Z","modified":"2026-03-27T19:39:20.845Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":6.8,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"4.0","versionLabel":"v4.0","source":"CVE.org","score":5.1,"severity":"medium","vector":"CVSS:4.0/AV:P/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N","exploitability":null,"impact":null,"computed":false},{"version":"4.0","versionLabel":"v4.0","source":"NVD","score":5.1,"severity":"medium","vector":"CVSS:4.0/AV:P/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:L/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","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":6.8,"severity":"medium","vector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00184,"percentile":0.07566,"severity":"low","asOf":"2026-10-21T00:00:00.000Z","change":{"pp":0.060000000000000005,"baselineDate":"2026-09-21T00:00:00.000Z","baselineScore":0.00124},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00124,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00124,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00124,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00124,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00124,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00124,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00124,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00124,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00124,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00124,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00184,"percentile":0.07566}],"last30":[{"date":"2026-09-21T00:00:00.000Z","score":0.00124,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00124,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00124,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00184,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00184,"percentile":0.07566}]},"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":[],"exploitCount":0,"weaknesses":[{"id":"CWE-312","name":"Cleartext Storage of Sensitive Information","description":"The product stores sensitive information in cleartext within a resource that might be accessible to another control sphere.","type":"weakness","status":"Draft","abstraction":"Base","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/312.html"}],"affected":[{"vendor":"tp-link systems inc.","product":"tl-wr850n v3","name":"TL-WR850N v3","label":"tl-wr850n v3","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< V3_0.9.1 Build251205","noFixRecorded":false,"fixedIn":null}],"versionsText":"< V3_0.9.1 Build251205","eol":null,"hubHref":"/vendor/tp-link_systems_inc/tl-wr850n_v3"},{"vendor":"tp-link","product":"tl-wr850n_firmware","name":"tl-wr850n firmware","label":"tl-wr850n_firmware","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"< 0.9.1_Build251205","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0.9.1_Build251205","eol":null,"hubHref":"/vendor/tp-link/tl-wr850n"}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://www.tp-link.com/in/support/download/tl-wr850n/#Firmware","label":"www.tp-link.com/in/support/download/tl-wr850n/","hostname":"www.tp-link.com","tags":["Patch","Product"]},{"url":"https://www.tp-link.com/us/support/faq/5034/","label":"www.tp-link.com/us/support/faq/5034/","hostname":"www.tp-link.com","tags":["Vendor Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-03-26T21:16:44.860Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-03-27T19:39:20.845Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":27,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T23:32:41.596Z","stale":false,"partial":false}}