{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-4346", "assignerOrgId": "f23511db-6c3e-4e32-a477-6aa17d310630", "state": "PUBLISHED", "assignerShortName": "TPLink", "dateReserved": "2026-03-17T16:03:38.913Z", "datePublished": "2026-03-26T21:16:44.860Z", "dateUpdated": "2026-03-26T21:16:44.860Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "f23511db-6c3e-4e32-a477-6aa17d310630", "shortName": "TPLink", "dateUpdated": "2026-03-26T21:16:44.860Z"}, "title": "Cleartext Storage of Administrative and Wi-Fi Credentials via Accessible Serial Interface in TP Link's TL-WR850N", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-312", "description": "CWE-312 Cleartext storage of sensitive information", "type": "CWE"}]}], "impacts": [{"capecId": "CAPEC-37", "descriptions": [{"lang": "en", "value": "CAPEC-37 Retrieve Embedded Sensitive Data"}]}], "affected": [{"vendor": "TP-Link Systems Inc.", "product": "TL-WR850N v3", "versions": [{"status": "affected", "version": "0", "lessThan": "V3_0.9.1 Build251205", "versionType": "custom"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "The vulnerability affecting TL-WR850N v3 allows cleartext storage of administrative and Wi-Fi credentials in a region of the device\u2019s 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\u2019s 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.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "The vulnerability affecting TL-WR850N v3 allows cleartext storage of administrative and Wi-Fi credentials in a region of the device\u2019s 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\u2019s management password and wireless network key.\n<br>Successful exploitation can lead to full administrative control of the device and unauthorized access to the associated wireless network.&nbsp;<br>"}]}], "references": [{"url": "https://www.tp-link.com/in/support/download/tl-wr850n/#Firmware", "tags": ["patch"]}, {"url": "https://www.tp-link.com/us/support/faq/5034/", "tags": ["vendor-advisory"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "PHYSICAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "HIGH", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "LOW", "vulnIntegrityImpact": "NONE", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "MEDIUM", "baseScore": 5.1, "vectorString": "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"}}], "credits": [{"lang": "en", "value": "Anirudh Tarikere Shankarappa", "type": "finder"}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "Vulnogram 1.0.1"}}}}

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