{"id":"CVE-2021-21000","aliases":["EUVD-2021-8409","GHSA-2ffw-fg59-p3gv"],"status":"published","title":"WAGO: PFC200 Denial of Service due to the number of connections to the runtime","description":"On WAGO PFC200 devices in different firmware versions with special crafted packets an attacker with network access to the device could cause a denial of service for the login service of the runtime.","severity":{"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":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.01037,"percentile":0.64391,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-770"],"published":"2021-05-24T11:05:05Z","modified":"2026-06-17T03:34:37Z","products":[{"vendor":"wago","product":"750-8202_firmware"},{"vendor":"wago","product":"750-8203_firmware"},{"vendor":"wago","product":"750-8204_firmware"},{"vendor":"wago","product":"750-8206_firmware"},{"vendor":"wago","product":"750-8207_firmware"},{"vendor":"wago","product":"750-8208_firmware"},{"vendor":"wago","product":"750-8210_firmware"},{"vendor":"wago","product":"750-8211_firmware"},{"vendor":"wago","product":"750-8212_firmware"},{"vendor":"wago","product":"750-8213_firmware"},{"vendor":"wago","product":"750-8214_firmware"},{"vendor":"wago","product":"750-8216_firmware"},{"vendor":"wago","product":"750-8217_firmware"},{"vendor":"wago","product":"750-823_firmware"},{"vendor":"wago","product":"750-829_firmware"},{"vendor":"wago","product":"750-831_firmware"},{"vendor":"wago","product":"750-832_firmware"},{"vendor":"wago","product":"750-852_firmware"},{"vendor":"wago","product":"750-862_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":"750-890_firmware"},{"vendor":"wago","product":"750-891_firmware"},{"vendor":"wago","product":"750-893_firmware"},{"vendor":"wago","product":"series ethernet controller"},{"vendor":"wago","product":"series pfc200 controller"}],"references":[{"url":"https://cert.vde.com/en-us/advisories/vde-2021-014","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-21000"},{"url":"https://github.com/advisories/GHSA-2ffw-fg59-p3gv"}],"sources":{"cve":[{"id":"CVE-2021-21000","title":"WAGO: PFC200 Denial of Service due to the number of connections to the runtime","description":"On WAGO PFC200 devices in different firmware versions with special crafted packets an attacker with network access to the device could cause a denial of service for the login service of the runtime.","status":"published","published":"2021-05-24T11:05:05.975Z","modified":"2024-09-16T18:43:52.677Z","cvss":[{"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":"cna"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:33:00.488332Z"}],"euvd":[{"id":"EUVD-2021-8409","description":"On WAGO PFC200 devices in different firmware versions with special crafted packets an attacker with network access to the device could cause a denial of service for the login service of the runtime.","status":"published","published":"2021-05-24T11:05:05Z","modified":"2024-09-16T18:43:52Z","cvss":[{"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"}],"updated_at":"2026-11-03T00:55:29.674428Z"}],"ghsa":[{"id":"GHSA-2ffw-fg59-p3gv","title":"On WAGO PFC200 devices in different firmware versions with special crafted packets an attacker...","description":"On WAGO PFC200 devices in different firmware versions with special crafted packets an attacker with network access to the device could cause a denial of service for the login service of the runtime.","status":"published","published":"2022-05-24T19:03:08Z","modified":"2025-08-15T21:32:19Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T15:03:19.214105Z"}],"nvd":[{"id":"CVE-2021-21000","description":"On WAGO PFC200 devices in different firmware versions with special crafted packets an attacker with network access to the device could cause a denial of service for the login service of the runtime.","status":"published","published":"2021-05-24T11:15:07.917Z","modified":"2026-06-17T03:34:37.923Z","cvss":[{"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":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","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-770"],"updated_at":"2026-11-02T14:06:53.987491Z"}]}}