{"id":"CVE-2018-8836","aliases":["EUVD-2018-20444","GHSA-pm5g-66xr-995q"],"status":"published","title":"Wago 750 Series PLCs with firmware version 10 and prior include a remote attack may take...","description":"Wago 750 Series PLCs with firmware version 10 and prior include a remote attack may take advantage of an improper implementation of the 3 way handshake during a TCP connection affecting the communications with commission and service tools. Specially crafted packets may also be sent to Port 2455/TCP/IP, used in Codesys management software, which may result in a denial-of-service condition of communications with commissioning and service tools.","severity":{"version":"3.0","score":5.3,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.03712,"percentile":0.89835,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-404"],"published":"2018-04-03T13:00:00Z","modified":"2026-06-17T02:05:28Z","products":[{"vendor":"wago","product":"750-829_firmware"},{"vendor":"wago","product":"750-831_firmware"},{"vendor":"wago","product":"750-852_firmware"},{"vendor":"wago","product":"750-880_firmware"},{"vendor":"wago","product":"750-881_firmware"},{"vendor":"wago","product":"750-882_firmware"},{"vendor":"wago","product":"750-885_firmware"},{"vendor":"wago","product":"750-889_firmware"},{"vendor":"wago","product":"wago 750 series"}],"references":[{"url":"http://www.securityfocus.com/bid/103726","tags":["vdb-entry","x_refsource_BID","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"https://ics-cert.us-cert.gov/advisories/ICSA-18-088-01","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","US Government Resource"]},{"url":"https://www.wago.com/medias/Vulnerability-in-the-WAGO-Ethernet-TCP-IP-driver.pdf?context=bWFzdGVyfHJvb3R8MjgxNDk0fGFwcGxpY2F0aW9uL3BkZnxoOTcvaDhkLzkxNTAyMjMyMjA3NjYucGRmfGRlNWQ4ODc0NTE5M2UyNTUwNTIyNDRlOWFkNWI2YjNkMzg0YTVhYzlmYTBjNzM4MDdmNmYzOTM5M2ZlMGEzNzE","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-8836"},{"url":"https://github.com/advisories/GHSA-pm5g-66xr-995q"}],"sources":{"cve":[{"id":"CVE-2018-8836","description":"Wago 750 Series PLCs with firmware version 10 and prior include a remote attack may take advantage of an improper implementation of the 3 way handshake during a TCP connection affecting the communications with commission and service tools. Specially crafted packets may also be sent to Port 2455/TCP/IP, used in Codesys management software, which may result in a denial-of-service condition of communications with commissioning and service tools.","status":"published","published":"2018-04-03T13:00:00Z","modified":"2024-09-17T04:13:48.585Z","cwes":["CWE-404"],"updated_at":"2026-11-02T14:35:03.825765Z"}],"euvd":[{"id":"EUVD-2018-20444","description":"Wago 750 Series PLCs with firmware version 10 and prior include a remote attack may take advantage of an improper implementation of the 3 way handshake during a TCP connection affecting the communications with commission and service tools. Specially crafted packets may also be sent to Port 2455/TCP/IP, used in Codesys management software, which may result in a denial-of-service condition of communications with commissioning and service tools.","status":"published","published":"2018-04-03T13:00:00Z","modified":"2024-09-17T04:13:48Z","updated_at":"2026-11-03T00:28:24.821388Z"}],"ghsa":[{"id":"GHSA-pm5g-66xr-995q","title":"Wago 750 Series PLCs with firmware version 10 and prior include a remote attack may take...","description":"Wago 750 Series PLCs with firmware version 10 and prior include a remote attack may take advantage of an improper implementation of the 3 way handshake during a TCP connection affecting the communications with commission and service tools. Specially crafted packets may also be sent to Port 2455/TCP/IP, used in Codesys management software, which may result in a denial-of-service condition of communications with commissioning and service tools.","status":"published","published":"2022-05-13T01:31:48Z","modified":"2023-02-01T05:08:23Z","cvss":[{"version":"3.0","score":5.3,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"cwes":["CWE-404"],"updated_at":"2026-11-02T14:50:45.067904Z"}],"nvd":[{"id":"CVE-2018-8836","description":"Wago 750 Series PLCs with firmware version 10 and prior include a remote attack may take advantage of an improper implementation of the 3 way handshake during a TCP connection affecting the communications with commission and service tools. Specially crafted packets may also be sent to Port 2455/TCP/IP, used in Codesys management software, which may result in a denial-of-service condition of communications with commissioning and service tools.","status":"published","published":"2018-04-03T13:29:00.277Z","modified":"2026-06-17T02:05:28.843Z","cvss":[{"version":"3.0","score":5.3,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-404"],"updated_at":"2026-11-02T14:04:24.700429Z"}]}}