{"id":"CVE-2021-34578","aliases":["EUVD-2021-21228","GHSA-m68m-r5xj-h4vj"],"status":"published","title":"WAGO: Authentication Vulnerability in Web-Based Management","description":"This vulnerability allows an attacker who has access to the WBM to read and write settings-parameters of the device by sending specifically constructed requests without authentication on multiple WAGO PLCs in firmware versions up to FW07.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00963,"percentile":0.62083,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-287"],"published":"2021-08-31T10:33:01Z","modified":"2026-06-17T03:56:09Z","products":[{"vendor":"wago","product":"750-362_firmware"},{"vendor":"wago","product":"750-363_firmware"},{"vendor":"wago","product":"750-823_firmware"},{"vendor":"wago","product":"750-832\\/000-002_firmware"},{"vendor":"wago","product":"750-832_firmware"},{"vendor":"wago","product":"750-862_firmware"},{"vendor":"wago","product":"750-890\\/025-000_firmware"},{"vendor":"wago","product":"750-890\\/025-001_firmware"},{"vendor":"wago","product":"750-890\\/025-002_firmware"},{"vendor":"wago","product":"750-890\\/040-000_firmware"},{"vendor":"wago","product":"750-891_firmware"},{"vendor":"wago","product":"750-893_firmware"},{"vendor":"wago","product":"plc"}],"references":[{"url":"https://cert.vde.com/en-us/advisories/vde-2020-044","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-34578"},{"url":"https://github.com/advisories/GHSA-m68m-r5xj-h4vj"}],"sources":{"cve":[{"id":"CVE-2021-34578","title":"WAGO: Authentication Vulnerability in Web-Based Management","description":"This vulnerability allows an attacker who has access to the WBM to read and write settings-parameters of the device by sending specifically constructed requests without authentication on multiple WAGO PLCs in firmware versions up to FW07.","status":"published","published":"2021-08-31T10:33:01.868Z","modified":"2024-09-16T18:33:25.112Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:33:11.244759Z"}],"euvd":[{"id":"EUVD-2021-21228","description":"This vulnerability allows an attacker who has access to the WBM to read and write settings-parameters of the device by sending specifically constructed requests without authentication on multiple WAGO PLCs in firmware versions up to FW07.","status":"published","published":"2021-08-31T10:33:01Z","modified":"2024-09-16T18:33:25Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-03T00:55:31.571078Z"}],"ghsa":[{"id":"GHSA-m68m-r5xj-h4vj","title":"This vulnerability allows an attacker who has access to the WBM to read and write settings...","description":"This vulnerability allows an attacker who has access to the WBM to read and write settings-parameters of the device by sending specifically constructed requests without authentication on multiple WAGO PLCs in firmware versions up to FW07.","status":"published","published":"2022-05-24T19:12:38Z","modified":"2023-01-30T05:01:51Z","cwes":["CWE-287"],"updated_at":"2026-11-02T14:46:30.304291Z"}],"nvd":[{"id":"CVE-2021-34578","description":"This vulnerability allows an attacker who has access to the WBM to read and write settings-parameters of the device by sending specifically constructed requests without authentication on multiple WAGO PLCs in firmware versions up to FW07.","status":"published","published":"2021-08-31T11:15:07.777Z","modified":"2026-06-17T03:56:09.823Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"},{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:06:57.67549Z"}]}}