{"id":"CVE-2020-5686","aliases":["EUVD-2020-26845","GHSA-gq7j-hx55-h62p"],"status":"published","title":"Incorrect implementation of authentication algorithm issue in UNIVERGE SV9500 series from V1 to...","description":"Incorrect implementation of authentication algorithm issue in UNIVERGE SV9500 series from V1 to V7and SV8500 series from S6 to S8 allows an attacker to access the remote system maintenance feature and obtain the information by sending a specially crafted request to a specific URL.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.01178,"percentile":0.67914,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-287"],"published":"2021-01-13T09:40:36Z","modified":"2026-06-17T03:22:05Z","products":[{"vendor":"nec","product":"univerge_sv8500_firmware"},{"vendor":"nec","product":"univerge_sv9500_firmware"},{"vendor":"nec corporation","product":"univerge sv9500/sv8500 series"}],"references":[{"url":"https://www.necplatforms.co.jp/en/press/security_adv.html","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://jvn.jp/en/jp/JVN38784555/index.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-5686"},{"url":"https://github.com/advisories/GHSA-gq7j-hx55-h62p"}],"sources":{"cve":[{"id":"CVE-2020-5686","description":"Incorrect implementation of authentication algorithm issue in UNIVERGE SV9500 series from V1 to V7and SV8500 series from S6 to S8 allows an attacker to access the remote system maintenance feature and obtain the information by sending a specially crafted request to a specific URL.","status":"published","published":"2021-01-13T09:40:36Z","modified":"2024-08-04T08:39:25.708Z","updated_at":"2026-11-02T14:35:47.56691Z"}],"euvd":[{"id":"EUVD-2020-26845","description":"Incorrect implementation of authentication algorithm issue in UNIVERGE SV9500 series from V1 to V7and SV8500 series from S6 to S8 allows an attacker to access the remote system maintenance feature and obtain the information by sending a specially crafted request to a specific URL.","status":"published","published":"2021-01-13T09:40:36Z","modified":"2024-08-04T08:39:25Z","updated_at":"2026-11-03T03:08:06.272693Z"}],"ghsa":[{"id":"GHSA-gq7j-hx55-h62p","title":"Incorrect implementation of authentication algorithm issue in UNIVERGE SV9500 series from V1 to...","description":"Incorrect implementation of authentication algorithm issue in UNIVERGE SV9500 series from V1 to V7and SV8500 series from S6 to S8 allows an attacker to access the remote system maintenance feature and obtain the information by sending a specially crafted request to a specific URL.","status":"published","published":"2022-05-24T17:39:00Z","modified":"2023-01-29T05:05:22Z","cwes":["CWE-287"],"updated_at":"2026-11-02T14:45:46.414099Z"}],"nvd":[{"id":"CVE-2020-5686","description":"Incorrect implementation of authentication algorithm issue in UNIVERGE SV9500 series from V1 to V7and SV8500 series from S6 to S8 allows an attacker to access the remote system maintenance feature and obtain the information by sending a specially crafted request to a specific URL.","status":"published","published":"2021-01-13T10:15:15.097Z","modified":"2026-06-17T03:22:05.58Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:06:28.892872Z"}]}}