{"id":"CVE-2023-2758","aliases":["EUVD-2023-34216","GHSA-grw6-p9qm-qmx4"],"status":"published","title":"Contec CONPROSYS HMI System (CHS) v3.5.2 Denial of Service","description":"A denial of service vulnerability exists in Contec CONPROSYS HMI System versions 3.5.2 and prior. When there is a time-zone mismatch in certain configuration files, a remote, unauthenticated attacker may deny logins for an extended period of time.","severity":{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"low","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.0104,"percentile":0.64252,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-799"],"published":"2023-05-31T14:09:49Z","modified":"2026-06-17T05:53:22Z","products":[{"vendor":"contec","product":"conprosys hmi system"},{"vendor":"contec","product":"conprosys_hmi_system"}],"references":[{"url":"https://www.tenable.com/security/research/tra-2023-21","tags":["x_transferred","Exploit","Third Party Advisory"]},{"url":"https://jvn.jp/en/vu/JVNVU93372935/index.html","tags":["x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-2758"},{"url":"https://github.com/advisories/GHSA-grw6-p9qm-qmx4"}],"sources":{"cve":[{"id":"CVE-2023-2758","title":"Contec CONPROSYS HMI System (CHS) v3.5.2 Denial of Service","description":"A denial of service vulnerability exists in Contec CONPROSYS HMI System versions 3.5.2 and prior. When there is a time-zone mismatch in certain configuration files, a remote, unauthenticated attacker may deny logins for an extended period of time.","status":"published","published":"2023-05-31T14:09:49.809Z","modified":"2025-01-09T20:26:25.295Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"low","assessor":"cna"}],"cwes":["CWE-799"],"updated_at":"2026-11-02T14:35:23.645864Z"}],"euvd":[{"id":"EUVD-2023-34216","description":"A denial of service vulnerability exists in Contec CONPROSYS HMI System versions 3.5.2 and prior. When there is a time-zone mismatch in certain configuration files, a remote, unauthenticated attacker may deny logins for an extended period of time.","status":"published","published":"2023-05-31T14:09:49Z","modified":"2025-01-09T20:26:25Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"low"}],"updated_at":"2026-11-03T00:04:22.117545Z"}],"ghsa":[{"id":"GHSA-grw6-p9qm-qmx4","title":"A denial of service vulnerability exists in Contec CONPROSYS HMI System versions 3.5.2 and prior....","description":"A denial of service vulnerability exists in Contec CONPROSYS HMI System versions 3.5.2 and prior. When there is a time-zone mismatch in certain configuration files, a remote, unauthenticated attacker may deny logins for an extended period of time.","status":"published","published":"2023-05-31T15:30:20Z","modified":"2024-04-04T04:26:11Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"low"}],"cwes":["CWE-799"],"updated_at":"2026-11-02T14:56:23.952584Z"}],"nvd":[{"id":"CVE-2023-2758","description":"A denial of service vulnerability exists in Contec CONPROSYS HMI System versions 3.5.2 and prior. When there is a time-zone mismatch in certain configuration files, a remote, unauthenticated attacker may deny logins for an extended period of time.","status":"published","published":"2023-05-31T15:15:09.473Z","modified":"2026-06-17T05:53:22.033Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"low","assessor":"secondary"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"primary"}],"cwes":["CWE-799"],"updated_at":"2026-11-02T14:08:03.795015Z"}]}}