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CVE-2020-6988

Estado: ModificadaAlta (7.5)—

Rockwell Automation MicroLogix 1400 Controllers Series B v21.001 and prior, Series A, all versions, MicroLogix 1100 Controller, all versions, RSLogix 500 Software v12.001 and prior, A remote, unauthenticated attacker can send a request from the RSLogix 500 software to the victim’s MicroLogix controller. The controller will then respond to the client with used password values to authenticate the user on the client-side. This method of authentication may allow an attacker to bypass authentication altogether, disclose sensitive information, or leak credentials.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (4)

Rockwellautomation — Micrologix 1100 FirmwareRockwellautomation — Micrologix 1400 A FirmwareRockwellautomation — Micrologix 1400 B FirmwareRockwellautomation — Rslogix 500

CWE

Referencias

JSON original (NVD)

Mostrar
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          "options": [
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              "exploitation": "none"
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              "automatable": "yes"
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              "technicalImpact": "partial"
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          "version": "2.0.3",
          "timestamp": "2026-06-03T13:21:18.328497Z"
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          "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
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        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
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  "affected": [
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          "versions": [
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  "published": "2020-03-16T16:15:14.767",
  "references": [
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      "url": "https://www.us-cert.gov/ics/advisories/icsa-20-070-06",
      "tags": [
        "Third Party Advisory",
        "US Government Resource"
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  "vulnStatus": "Modified",
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      "source": "ics-cert@hq.dhs.gov",
      "description": [
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          "value": "CWE-603"
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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
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          "value": "CWE-287"
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      "value": "Rockwell Automation MicroLogix 1400 Controllers Series B v21.001 and prior, Series A, all versions, MicroLogix 1100 Controller, all versions, RSLogix 500 Software v12.001 and prior, A remote, unauthenticated attacker can send a request from the RSLogix 500 software to the victim’s MicroLogix controller. The controller will then respond to the client with used password values to authenticate the user on the client-side. This method of authentication may allow an attacker to bypass authentication altogether, disclose sensitive information, or leak credentials."
    },
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    }
  ],
  "lastModified": "2026-06-17T03:24:04.460",
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