{"api_version":"1","generated_at":"2026-04-23T19:07:24+00:00","cve":"CVE-2021-22659","urls":{"html":"https://cve.report/CVE-2021-22659","api":"https://cve.report/api/cve/CVE-2021-22659.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2021-22659","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-22659"},"summary":{"title":"CVE-2021-22659","description":"Rockwell Automation MicroLogix 1400 Version 21.6 and below may allow a remote unauthenticated attacker to send a specially crafted Modbus packet allowing the attacker to retrieve or modify random values in the register. If successfully exploited, this may lead to a buffer overflow resulting in a denial-of-service condition. The FAULT LED will flash RED and communications may be lost. 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If successfully exploited, this may lead to a buffer overflow resulting in a denial-of-service condition. The FAULT LED will flash RED and communications may be lost. Recovery from denial-of-service condition requires the fault to be cleared by the user.","Type":"Description","Title":null},{"CveYear":"2021","CveId":"22659","Ordinal":"2","NoteData":"2021-03-25","Type":"Other","Title":"Published"},{"CveYear":"2021","CveId":"22659","Ordinal":"3","NoteData":"2021-03-25","Type":"Other","Title":"Modified"}]}}}