{ "containers": { "cna": { "affected": [ { "product": "Rockwell Automation MicroLogix 1400", "vendor": "n/a", "versions": [ { "status": "affected", "version": "MicroLogix 1400, All series Version 21.6 and below" } ] } ], "descriptions": [ { "lang": "en", "value": "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. Recovery from denial-of-service condition requires the fault to be cleared by the user." } ], "problemTypes": [ { "descriptions": [ { "cweId": "CWE-120", "description": "CLASSIC BUFFER OVERFLOW CWE-120", "lang": "en", "type": "CWE" } ] } ], "providerMetadata": { "dateUpdated": "2021-03-25T15:59:07.000Z", "orgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6", "shortName": "icscert" }, "references": [ { "tags": [ "x_refsource_MISC" ], "url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-033-01" }, { "tags": [ "x_refsource_MISC" ], "url": "https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/1129877/loc/en_US#__highlight" } ], "x_legacyV4Record": { "CVE_data_meta": { "ASSIGNER": "ics-cert@hq.dhs.gov", "ID": "CVE-2021-22659", "STATE": "PUBLIC" }, "affects": { "vendor": { "vendor_data": [ { "product": { "product_data": [ { "product_name": "Rockwell Automation MicroLogix 1400", "version": { "version_data": [ { "version_value": "MicroLogix 1400, All series Version 21.6 and below" } ] } } ] }, "vendor_name": "n/a" } ] } }, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": { "description_data": [ { "lang": "eng", "value": "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. Recovery from denial-of-service condition requires the fault to be cleared by the user." } ] }, "problemtype": { "problemtype_data": [ { "description": [ { "lang": "eng", "value": "CLASSIC BUFFER OVERFLOW CWE-120" } ] } ] }, "references": { "reference_data": [ { "name": "https://us-cert.cisa.gov/ics/advisories/icsa-21-033-01", "refsource": "MISC", "url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-033-01" }, { "name": "https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/1129877/loc/en_US#__highlight", "refsource": "MISC", "url": "https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/1129877/loc/en_US#__highlight" } ] } } }, "adp": [ { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T18:51:07.020Z" }, "title": "CVE Program Container", "references": [ { "tags": [ "x_refsource_MISC", "x_transferred" ], "url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-033-01" }, { "tags": [ "x_refsource_MISC", "x_transferred" ], "url": "https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/1129877/loc/en_US#__highlight" } ] }, { "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE" } }, { "other": { "type": "ssvc", "content": { "timestamp": "2026-06-03T13:09:27.807640Z", "id": "CVE-2021-22659", "options": [ { "Exploitation": "none" }, { "Automatable": "yes" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-03T13:10:07.459Z" } } ] }, "cveMetadata": { "assignerOrgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6", "assignerShortName": "icscert", "cveId": "CVE-2021-22659", "datePublished": "2021-03-25T15:59:07.000Z", "dateReserved": "2021-01-05T00:00:00.000Z", "dateUpdated": "2026-06-03T13:10:07.459Z", "state": "PUBLISHED" }, "dataType": "CVE_RECORD", "dataVersion": "5.2" }