{"id":"CVE-2022-26639","aliases":["EUVD-2022-31193","GHSA-v457-62x9-vgw8"],"status":"published","title":"TP-LINK TL-WR840N(ES)_V6.20 was discovered to contain a buffer overflow via the DNSServers...","description":"TP-LINK TL-WR840N(ES)_V6.20 was discovered to contain a buffer overflow via the DNSServers parameter.","severity":{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.01253,"percentile":0.69661,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-120"],"published":"2022-03-28T22:42:46Z","modified":"2026-06-17T04:35:33Z","products":[{"vendor":"tp-link","product":"tl-wr840n_firmware"}],"references":[{"url":"https://github.com/Quadron-Research-Lab/Hardware-IoT/blob/main/tp-link%20tl-wr840n_DNSServers%3D.pdf","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-26639"},{"url":"https://github.com/advisories/GHSA-v457-62x9-vgw8"}],"sources":{"cve":[{"id":"CVE-2022-26639","description":"TP-LINK TL-WR840N(ES)_V6.20 was discovered to contain a buffer overflow via the DNSServers parameter.","status":"published","published":"2022-03-28T22:42:46Z","modified":"2024-08-03T05:11:42.702Z","updated_at":"2026-11-02T14:34:26.293612Z"}],"euvd":[{"id":"EUVD-2022-31193","description":"TP-LINK TL-WR840N(ES)_V6.20 was discovered to contain a buffer overflow via the DNSServers parameter.","status":"published","published":"2022-03-28T22:42:46Z","modified":"2024-08-03T05:11:42Z","updated_at":"2026-11-03T03:25:44.694159Z"}],"ghsa":[{"id":"GHSA-v457-62x9-vgw8","title":"TP-LINK TL-WR840N(ES)_V6.20 was discovered to contain a buffer overflow via the DNSServers...","description":"TP-LINK TL-WR840N(ES)_V6.20 was discovered to contain a buffer overflow via the DNSServers parameter.","status":"published","published":"2022-03-30T00:00:31Z","modified":"2023-01-30T05:00:27Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-120"],"updated_at":"2026-11-02T14:46:12.604648Z"}],"nvd":[{"id":"CVE-2022-26639","description":"TP-LINK TL-WR840N(ES)_V6.20 was discovered to contain a buffer overflow via the DNSServers parameter.","status":"published","published":"2022-03-28T23:15:07.81Z","modified":"2026-06-17T04:35:33.787Z","cvss":[{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.5,"vector":"AV:N/AC:L/Au:S/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-120"],"updated_at":"2026-11-02T14:07:14.24948Z"}]}}