{"id":"CVE-2021-29280","aliases":["EUVD-2021-15917","GHSA-qcq8-mgfx-4pfj"],"status":"published","title":"In TP-Link Wireless N Router WR840N an ARP poisoning attack can cause buffer overflow","description":"In TP-Link Wireless N Router WR840N an ARP poisoning attack can cause buffer overflow","severity":{"version":"3.1","score":6.4,"vector":"CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00754,"percentile":0.55378,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-668"],"published":"2021-08-19T15:31:55Z","modified":"2026-06-17T03:47:29Z","products":[{"vendor":"tp-link","product":"tl-wr840n_firmware"}],"references":[{"url":"https://github.com/deadlysnowman3308/upgraded-ARP-Poisoning","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://hackingvila.wordpress.com/2021/04/28/upgraded-arp-poisoning-tool/","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-29280"},{"url":"https://github.com/advisories/GHSA-qcq8-mgfx-4pfj"}],"sources":{"cve":[{"id":"CVE-2021-29280","description":"In TP-Link Wireless N Router WR840N an ARP poisoning attack can cause buffer overflow","status":"published","published":"2021-08-19T15:31:55Z","modified":"2024-08-03T22:02:51.555Z","updated_at":"2026-11-02T14:33:06.658806Z"}],"euvd":[{"id":"EUVD-2021-15917","description":"In TP-Link Wireless N Router WR840N an ARP poisoning attack can cause buffer overflow","status":"published","published":"2021-08-19T15:31:55Z","modified":"2024-08-03T22:02:51Z","updated_at":"2026-11-03T03:24:45.000012Z"}],"ghsa":[{"id":"GHSA-qcq8-mgfx-4pfj","title":"In TP-Link Wireless N Router WR840N an ARP poisoning attack can cause buffer overflow","description":"In TP-Link Wireless N Router WR840N an ARP poisoning attack can cause buffer overflow","status":"published","published":"2022-05-24T19:11:40Z","modified":"2023-01-30T05:01:34Z","cwes":["CWE-668"],"updated_at":"2026-11-02T14:46:26.483285Z"}],"nvd":[{"id":"CVE-2021-29280","description":"In TP-Link Wireless N Router WR840N an ARP poisoning attack can cause buffer overflow","status":"published","published":"2021-08-19T16:15:12.197Z","modified":"2026-06-17T03:47:29.26Z","cvss":[{"version":"3.1","score":6.4,"vector":"CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:A/AC:M/Au:N/C:N/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-668"],"updated_at":"2026-11-02T14:06:57.318236Z"}]}}