{"id":"CVE-2021-31399","aliases":["EUVD-2021-18309","GHSA-c9p5-2jv2-63vv"],"status":"published","title":"On 2N Access Unit 2.0 2.31.0.40.5 devices, an attacker can pose as the web relay for a man-in-the...","description":"On 2N Access Unit 2.0 2.31.0.40.5 devices, an attacker can pose as the web relay for a man-in-the-middle attack.","severity":{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AC:L/AV:A/A:L/C:L/I:N/PR:N/S:U/UI:R","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00846,"percentile":0.585,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-295"],"published":"2021-08-13T12:05:23Z","modified":"2026-06-17T03:51:42Z","products":[{"vendor":"2n","product":"access_unit_2.0_firmware"}],"references":[{"url":"https://www.2n.cz/en_GB/products/ip-access-control/2n-access-unit-2","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://excellium-services.com/cert-xlm-advisory/cve-2021-31399/","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://cds.thalesgroup.com/en/tcs-cert/CVE-2021-31399"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-31399"},{"url":"https://excellium-services.com/cert-xlm-advisory/cve-2021-31399"},{"url":"https://github.com/advisories/GHSA-c9p5-2jv2-63vv"}],"sources":{"cve":[{"id":"CVE-2021-31399","description":"On 2N Access Unit 2.0 2.31.0.40.5 devices, an attacker can pose as the web relay for a man-in-the-middle attack.","status":"published","published":"2021-08-13T12:05:23Z","modified":"2025-05-30T16:01:46.32Z","cvss":[{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AC:L/AV:A/A:L/C:L/I:N/PR:N/S:U/UI:R","level":"medium","assessor":"cna"}],"updated_at":"2026-11-02T14:33:05.665371Z"}],"euvd":[{"id":"EUVD-2021-18309","description":"On 2N Access Unit 2.0 2.31.0.40.5 devices, an attacker can pose as the web relay for a man-in-the-middle attack.","status":"published","published":"2021-08-13T12:05:23Z","modified":"2025-05-30T16:01:46Z","cvss":[{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AC:L/AV:A/A:L/C:L/I:N/PR:N/S:U/UI:R","level":"medium"}],"updated_at":"2026-11-02T20:32:34.145186Z"}],"ghsa":[{"id":"GHSA-c9p5-2jv2-63vv","title":"On 2N Access Unit 2.0 2.31.0.40.5 devices, an attacker can pose as the web relay for a man-in-the...","description":"On 2N Access Unit 2.0 2.31.0.40.5 devices, an attacker can pose as the web relay for a man-in-the-middle attack.","status":"published","published":"2022-05-24T19:11:07Z","modified":"2025-05-30T18:31:47Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"medium"}],"cwes":["CWE-295"],"updated_at":"2026-11-02T15:02:31.34634Z"}],"nvd":[{"id":"CVE-2021-31399","description":"On 2N Access Unit 2.0 2.31.0.40.5 devices, an attacker can pose as the web relay for a man-in-the-middle attack.","status":"published","published":"2021-08-13T13:15:08.38Z","modified":"2026-06-17T03:51:42.373Z","cvss":[{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-295"],"updated_at":"2026-11-02T14:06:56.943671Z"}]}}