FKIE_CVE-2021-36166

Vulnerability from fkie_nvd - Published: 2022-03-01 18:15 - Updated: 2026-06-17 03:58
Severity
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
An improper authentication vulnerability in FortiMail before 7.0.1 may allow a remote attacker to efficiently guess one administrative account's authentication token by means of the observation of certain system's properties.
References
psirt@fortinet.comhttps://fortiguard.com/psirt/FG-IR-21-028Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://fortiguard.com/psirt/FG-IR-21-028Vendor Advisory
Impacted products
Vendor Product Version
fortinet fortimail *
fortinet fortimail *
fortinet fortimail *
fortinet fortimail *
fortinet fortimail 7.0.0
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "Fortinet FortiMail",
          "vendor": "Fortinet",
          "versions": [
            {
              "status": "affected",
              "version": "FortiMail before 7.0.1"
            }
          ]
        }
      ],
      "source": "psirt@fortinet.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:fortinet:fortimail:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "012B958E-B46C-4E94-91FA-6E0083739215",
              "versionEndIncluding": "5.4.12",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:fortinet:fortimail:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "949AE030-B3F8-496D-AB9A-8F34203C3CB0",
              "versionEndExcluding": "6.0.12",
              "versionStartIncluding": "6.0.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:fortinet:fortimail:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "9BAEA8B7-C4D3-4C12-8EF0-77A3F0EF2A14",
              "versionEndExcluding": "6.2.8",
              "versionStartIncluding": "6.2.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:fortinet:fortimail:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "9ABBEADA-F0B2-4661-ADEA-4E9998564E69",
              "versionEndExcluding": "6.4.6",
              "versionStartIncluding": "6.4.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:fortinet:fortimail:7.0.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "15993051-6D79-4D59-B43D-EE3DA539AA18",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An improper authentication vulnerability in FortiMail before 7.0.1 may allow a remote attacker to efficiently guess one administrative account\u0027s authentication token by means of the observation of certain system\u0027s properties."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de autenticaci\u00f3n inapropiada en FortiMail versiones anteriores a 7.0.1, puede permitir a un atacante remoto adivinar eficazmente el token de autenticaci\u00f3n de una cuenta administrativa mediante la observaci\u00f3n de determinadas propiedades del sistema."
    }
  ],
  "id": "CVE-2021-36166",
  "lastModified": "2026-06-17T03:58:26.920",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "HIGH",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 7.5,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 6.4,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "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": "psirt@fortinet.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"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-36166",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-10-23T14:19:17.953234Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2022-03-01T18:15:08.240",
  "references": [
    {
      "source": "psirt@fortinet.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://fortiguard.com/psirt/FG-IR-21-028"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://fortiguard.com/psirt/FG-IR-21-028"
    }
  ],
  "sourceIdentifier": "psirt@fortinet.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-330"
        }
      ],
      "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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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.