FKIE_CVE-2021-27663

Vulnerability from fkie_nvd - Published: 2021-08-30 18:15 - Updated: 2026-06-17 03:45
Severity
8.2 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
A vulnerability in versions 10.1 through 10.5 of Johnson Controls CEM Systems AC2000 allows a remote attacker to access to the system without adequate authorization. This issue affects: Johnson Controls CEM Systems AC2000 10.1; 10.2; 10.3; 10.4; 10.5.
References
productsecurity@jci.comhttps://us-cert.gov/ics/advisories/ICSA-21-238-01Third Party Advisory, US Government Resource
productsecurity@jci.comhttps://www.johnsoncontrols.com/cyber-solutions/security-advisoriesVendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://us-cert.gov/ics/advisories/ICSA-21-238-01Third Party Advisory, US Government Resource
af854a3a-2127-422b-91ae-364da2661108https://www.johnsoncontrols.com/cyber-solutions/security-advisoriesVendor Advisory
Impacted products
Vendor Product Version
johnsoncontrols ac2000_firmware *
johnsoncontrols ac2000 -
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "CEM Systems AC2000",
          "vendor": "Johnson Controls",
          "versions": [
            {
              "lessThanOrEqual": "10.5",
              "status": "affected",
              "version": "10.1",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "productsecurity@jci.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:johnsoncontrols:ac2000_firmware:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "B7990FFE-22BA-482F-92A0-9E3DA64467A6",
              "versionEndIncluding": "10.5",
              "versionStartIncluding": "10.1",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:h:johnsoncontrols:ac2000:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "9B69C423-26B0-480F-BDA7-6836945BD47B",
              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability in versions 10.1 through 10.5 of Johnson Controls CEM Systems AC2000 allows a remote attacker to access to the system without adequate authorization. This issue affects: Johnson Controls CEM Systems AC2000 10.1; 10.2; 10.3; 10.4; 10.5."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad en versiones 10.1 hasta 10.5 de Johnson Controls CEM Systems AC2000, permite a un atacante remoto acceder al sistema sin la autorizaci\u00f3n adecuada. Este problema afecta a: Johnson Controls CEM Systems AC2000 versiones 10.1; 10.2; 10.3; 10.4; 10.5."
    }
  ],
  "id": "CVE-2021-27663",
  "lastModified": "2026-06-17T03:45:19.170",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "HIGH",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "COMPLETE",
          "baseScore": 9.3,
          "confidentialityImpact": "COMPLETE",
          "integrityImpact": "COMPLETE",
          "vectorString": "AV:N/AC:M/Au:N/C:C/I:C/A:C",
          "version": "2.0"
        },
        "exploitabilityScore": 8.6,
        "impactScore": 10.0,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 8.2,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 4.2,
        "source": "productsecurity@jci.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2021-08-30T18:15:08.663",
  "references": [
    {
      "source": "productsecurity@jci.com",
      "tags": [
        "Third Party Advisory",
        "US Government Resource"
      ],
      "url": "https://us-cert.gov/ics/advisories/ICSA-21-238-01"
    },
    {
      "source": "productsecurity@jci.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://www.johnsoncontrols.com/cyber-solutions/security-advisories"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory",
        "US Government Resource"
      ],
      "url": "https://us-cert.gov/ics/advisories/ICSA-21-238-01"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://www.johnsoncontrols.com/cyber-solutions/security-advisories"
    }
  ],
  "sourceIdentifier": "productsecurity@jci.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-285"
        }
      ],
      "source": "productsecurity@jci.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


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