{"id":"CVE-2017-5544","aliases":["EUVD-2017-14645","GHSA-crmv-fcq6-r57v"],"status":"published","title":"An issue was discovered on FiberHome Fengine S5800 switches V210R240. An unauthorized attacker...","description":"An issue was discovered on FiberHome Fengine S5800 switches V210R240. An unauthorized attacker can access the device's SSH service, using a password cracking tool to establish SSH connections quickly. This will trigger an increase in the SSH login timeout (each of the login attempts will occupy a connection slot for a longer time). Once this occurs, legitimate login attempts via SSH/telnet will be refused, resulting in a denial of service; you must restart the device.","severity":{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.05247,"percentile":0.92589,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-400"],"published":"2017-01-23T06:49:00Z","modified":"2026-06-17T01:20:43Z","products":[{"vendor":"fiberhome","product":"fengine_s5800_firmware"}],"references":[{"url":"http://www.nfcwar.com","tags":["x_refsource_MISC","x_transferred","URL Repurposed"]},{"url":"http://www.securityfocus.com/bid/95708","tags":["vdb-entry","x_refsource_BID","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2017-5544"},{"url":"https://github.com/advisories/GHSA-crmv-fcq6-r57v"}],"sources":{"cve":[{"id":"CVE-2017-5544","description":"An issue was discovered on FiberHome Fengine S5800 switches V210R240. An unauthorized attacker can access the device's SSH service, using a password cracking tool to establish SSH connections quickly. This will trigger an increase in the SSH login timeout (each of the login attempts will occupy a connection slot for a longer time). Once this occurs, legitimate login attempts via SSH/telnet will be refused, resulting in a denial of service; you must restart the device.","status":"published","published":"2017-01-23T06:49:00Z","modified":"2024-08-05T15:04:15.292Z","updated_at":"2026-11-02T14:33:12.942409Z"}],"euvd":[{"id":"EUVD-2017-14645","description":"An issue was discovered on FiberHome Fengine S5800 switches V210R240. An unauthorized attacker can access the device's SSH service, using a password cracking tool to establish SSH connections quickly. This will trigger an increase in the SSH login timeout (each of the login attempts will occupy a connection slot for a longer time). Once this occurs, legitimate login attempts via SSH/telnet will be refused, resulting in a denial of service; you must restart the device.","status":"published","published":"2017-01-23T06:49:00Z","modified":"2024-08-05T15:04:15Z","updated_at":"2026-11-03T02:39:15.385305Z"}],"ghsa":[{"id":"GHSA-crmv-fcq6-r57v","title":"An issue was discovered on FiberHome Fengine S5800 switches V210R240. An unauthorized attacker...","description":"An issue was discovered on FiberHome Fengine S5800 switches V210R240. An unauthorized attacker can access the device's SSH service, using a password cracking tool to establish SSH connections quickly. This will trigger an increase in the SSH login timeout (each of the login attempts will occupy a connection slot for a longer time). Once this occurs, legitimate login attempts via SSH/telnet will be refused, resulting in a denial of service; you must restart the device.","status":"published","published":"2022-05-13T01:06:18Z","modified":"2023-02-01T05:02:56Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:49:59.960888Z"}],"nvd":[{"id":"CVE-2017-5544","description":"An issue was discovered on FiberHome Fengine S5800 switches V210R240. An unauthorized attacker can access the device's SSH service, using a password cracking tool to establish SSH connections quickly. This will trigger an increase in the SSH login timeout (each of the login attempts will occupy a connection slot for a longer time). Once this occurs, legitimate login attempts via SSH/telnet will be refused, resulting in a denial of service; you must restart the device.","status":"published","published":"2017-01-23T07:59:00.547Z","modified":"2026-06-17T01:20:43.02Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":7.1,"vector":"AV:N/AC:M/Au:N/C:N/I:N/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:03:42.372487Z"}]}}