{"id":"CVE-2021-20712","aliases":["EUVD-2021-8127","GHSA-c7vp-4m6m-jg9v"],"status":"published","title":"Improper access control vulnerability in NEC Aterm WG2600HS firmware Ver1.5.1 and earlier, and...","description":"Improper access control vulnerability in NEC Aterm WG2600HS firmware Ver1.5.1 and earlier, and Aterm WX3000HP firmware Ver1.1.2 and earlier allows a device connected to the LAN side to be accessed from the WAN side due to the defect in the IPv6 firewall function.","severity":{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.00801,"percentile":0.5706,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-863"],"published":"2021-04-26T00:20:46Z","modified":"2026-06-17T03:34:18Z","products":[{"vendor":"nec","product":"aterm_wg2600hs_firmware"},{"vendor":"nec","product":"aterm_wx3000hp_firmware"},{"vendor":"nec corporation","product":"nec aterm devices"}],"references":[{"url":"https://jpn.nec.com/security-info/secinfo/nv21-010.html","tags":["x_refsource_MISC","x_transferred","Mitigation","Vendor Advisory"]},{"url":"https://jvn.jp/en/jp/JVN29739718/index.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-20712"},{"url":"https://github.com/advisories/GHSA-c7vp-4m6m-jg9v"}],"sources":{"cve":[{"id":"CVE-2021-20712","description":"Improper access control vulnerability in NEC Aterm WG2600HS firmware Ver1.5.1 and earlier, and Aterm WX3000HP firmware Ver1.1.2 and earlier allows a device connected to the LAN side to be accessed from the WAN side due to the defect in the IPv6 firewall function.","status":"published","published":"2021-04-26T00:20:46Z","modified":"2024-08-03T17:53:21.234Z","updated_at":"2026-11-02T14:32:55.905855Z"}],"euvd":[{"id":"EUVD-2021-8127","description":"Improper access control vulnerability in NEC Aterm WG2600HS firmware Ver1.5.1 and earlier, and Aterm WX3000HP firmware Ver1.1.2 and earlier allows a device connected to the LAN side to be accessed from the WAN side due to the defect in the IPv6 firewall function.","status":"published","published":"2021-04-26T00:20:46Z","modified":"2024-08-03T17:53:21Z","updated_at":"2026-11-03T03:25:08.33351Z"}],"ghsa":[{"id":"GHSA-c7vp-4m6m-jg9v","title":"Improper access control vulnerability in NEC Aterm WG2600HS firmware Ver1.5.1 and earlier, and...","description":"Improper access control vulnerability in NEC Aterm WG2600HS firmware Ver1.5.1 and earlier, and Aterm WX3000HP firmware Ver1.1.2 and earlier allows a device connected to the LAN side to be accessed from the WAN side due to the defect in the IPv6 firewall function.","status":"published","published":"2022-05-24T17:48:47Z","modified":"2023-01-27T05:02:45Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T14:42:05.930236Z"}],"nvd":[{"id":"CVE-2021-20712","description":"Improper access control vulnerability in NEC Aterm WG2600HS firmware Ver1.5.1 and earlier, and Aterm WX3000HP firmware Ver1.1.2 and earlier allows a device connected to the LAN side to be accessed from the WAN side due to the defect in the IPv6 firewall function.","status":"published","published":"2021-04-26T01:15:08.06Z","modified":"2026-06-17T03:34:18.167Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:06:52.81233Z"}]}}