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CVE-2023-47537 (GCVE-0-2023-47537)

Vulnerability from cvelistv5 – Published: 2024-02-15 13:59 – Updated: 2026-01-14 09:15
VLAI
Summary
An improper certificate validation vulnerability in Fortinet FortiOS 7.4.0 through 7.4.1, FortiOS 7.2.0 through 7.2.6, FortiOS 7.0.0 through 7.0.15, FortiOS 6.4 all versions allows a remote and unauthenticated attacker to perform a Man-in-the-Middle attack on the FortiLink communication channel between the FortiOS device and FortiSwitch.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-05-21 13:43 UTC
CWE
References
Impacted products
Vendor Product Version CPE status
Fortinet FortiOS Affected: 7.4.0 , ≤ 7.4.1 (semver)
Affected: 7.2.0 , ≤ 7.2.6 (semver)
Affected: 7.0.0 , ≤ 7.0.15 (semver)
Affected: 6.4.0 , ≤ 6.4.16 (semver)
    cpe:2.3:o:fortinet:fortios:7.4.1:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:7.4.0:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:7.2.6:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:7.2.5:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:7.2.4:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:7.2.3:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:7.2.2:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:7.2.1:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:7.2.0:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:7.0.15:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:7.0.14:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:7.0.13:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:7.0.12:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:7.0.11:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:7.0.10:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:7.0.9:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:7.0.8:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:7.0.7:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:7.0.6:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:7.0.5:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:7.0.4:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:7.0.3:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:7.0.2:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:7.0.1:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:7.0.0:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:6.4.16:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:6.4.15:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:6.4.14:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:6.4.13:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:6.4.12:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:6.4.11:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:6.4.10:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:6.4.9:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:6.4.8:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:6.4.7:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:6.4.6:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:6.4.5:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:6.4.4:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:6.4.3:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:6.4.2:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:6.4.1:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortios:6.4.0:*:*:*:*:*:*:*
Create a notification for this product.
fortinet fortios Affected: 6.4.0
Affected: 7.0.0
Affected: 7.2.0
Affected: 7.4.0
    cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

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            "cpe:2.3:o:fortinet:fortios:7.0.0:*:*:*:*:*:*:*",
            "cpe:2.3:o:fortinet:fortios:6.4.16:*:*:*:*:*:*:*",
            "cpe:2.3:o:fortinet:fortios:6.4.15:*:*:*:*:*:*:*",
            "cpe:2.3:o:fortinet:fortios:6.4.14:*:*:*:*:*:*:*",
            "cpe:2.3:o:fortinet:fortios:6.4.13:*:*:*:*:*:*:*",
            "cpe:2.3:o:fortinet:fortios:6.4.12:*:*:*:*:*:*:*",
            "cpe:2.3:o:fortinet:fortios:6.4.11:*:*:*:*:*:*:*",
            "cpe:2.3:o:fortinet:fortios:6.4.10:*:*:*:*:*:*:*",
            "cpe:2.3:o:fortinet:fortios:6.4.9:*:*:*:*:*:*:*",
            "cpe:2.3:o:fortinet:fortios:6.4.8:*:*:*:*:*:*:*",
            "cpe:2.3:o:fortinet:fortios:6.4.7:*:*:*:*:*:*:*",
            "cpe:2.3:o:fortinet:fortios:6.4.6:*:*:*:*:*:*:*",
            "cpe:2.3:o:fortinet:fortios:6.4.5:*:*:*:*:*:*:*",
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            "cpe:2.3:o:fortinet:fortios:6.4.2:*:*:*:*:*:*:*",
            "cpe:2.3:o:fortinet:fortios:6.4.1:*:*:*:*:*:*:*",
            "cpe:2.3:o:fortinet:fortios:6.4.0:*:*:*:*:*:*:*"
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          "product": "FortiOS",
          "vendor": "Fortinet",
          "versions": [
            {
              "lessThanOrEqual": "7.4.1",
              "status": "affected",
              "version": "7.4.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.6",
              "status": "affected",
              "version": "7.2.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.15",
              "status": "affected",
              "version": "7.0.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.4.16",
              "status": "affected",
              "version": "6.4.0",
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          "lang": "en",
          "value": "An improper certificate validation vulnerability in Fortinet FortiOS 7.4.0 through 7.4.1, FortiOS 7.2.0 through 7.2.6, FortiOS 7.0.0 through 7.0.15, FortiOS 6.4 all versions\t allows a remote and unauthenticated attacker to perform a Man-in-the-Middle attack on the FortiLink communication channel between the FortiOS device and FortiSwitch."
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      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 4.4,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:X/RC:X",
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          "name": "https://fortiguard.com/psirt/FG-IR-23-301",
          "url": "https://fortiguard.com/psirt/FG-IR-23-301"
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      ],
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        {
          "lang": "en",
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    "dateReserved": "2023-11-06T10:35:25.828Z",
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    "epss": {
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      "date": "2026-09-17",
      "epss": "0.00214",
      "percentile": "0.12003"
    },
    "fkie_nvd": {
      "configurations": "[{\"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"7.0.0\", \"versionEndExcluding\": \"7.0.14\", \"matchCriteriaId\": \"C119229A-3805-47C1-B3F9-AF1A4007A63B\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"7.2.0\", \"versionEndIncluding\": \"7.2.6\", \"matchCriteriaId\": \"24D09A92-81EC-4003-B017-C67FC739EEBF\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:fortinet:fortios:7.4.0:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"61540F5B-080A-4D44-8BE0-75D7A0DCCB53\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:fortinet:fortios:7.4.1:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"17FE168A-0EA4-467C-91D2-87EB6D83917A\"}]}]}]",
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      "id": "CVE-2023-47537",
      "lastModified": "2024-11-21T08:30:25.100",
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    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-47537\",\"sourceIdentifier\":\"psirt@fortinet.com\",\"published\":\"2024-02-15T14:15:45.240\",\"lastModified\":\"2026-06-17T06:32:51.717\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"An improper certificate validation vulnerability in Fortinet FortiOS 7.4.0 through 7.4.1, FortiOS 7.2.0 through 7.2.6, FortiOS 7.0.0 through 7.0.15, FortiOS 6.4 all versions\\t allows a remote and unauthenticated attacker to perform a Man-in-the-Middle attack on the FortiLink communication channel between the FortiOS device and FortiSwitch.\"},{\"lang\":\"es\",\"value\":\"Una vulnerabilidad de validaci\u00f3n de certificado incorrecta en Fortinet FortiOS 7.0.0 - 7.0.13, 7.2.0 - 7.2.6 y 7.4.0 - 7.4.1 permite que un atacante remoto y no autenticado realice un ataque Man-in-the-Middle en el Canal de comunicaci\u00f3n FortiLink entre el dispositivo FortiOS y 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Advisory\"]},{\"url\":\"https://fortiguard.com/psirt/FG-IR-23-301\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Vendor Advisory\"]}]}}",
    "redhat_vex": {
      "current_release_date": "2026-01-14T10:25:30+00:00",
      "cve": "CVE-2023-47537",
      "id": "CVE-2023-47537",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "CVE-2023-47537",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-47537.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://fortiguard.com/psirt/FG-IR-23-301\", \"name\": \"https://fortiguard.com/psirt/FG-IR-23-301\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-02T21:09:37.377Z\"}}, {\"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2023-47537\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-05-21T13:43:02.127242Z\"}}}], \"affected\": [{\"cpes\": [\"cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*\"], \"vendor\": \"fortinet\", \"product\": \"fortios\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.4.0\"}, {\"status\": \"affected\", \"version\": \"7.0.0\"}, {\"status\": \"affected\", \"version\": \"7.2.0\"}, 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\"vendor\": \"Fortinet\", \"product\": \"FortiOS\", \"versions\": [{\"status\": \"affected\", \"version\": \"7.4.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"7.4.1\"}, {\"status\": \"affected\", \"version\": \"7.2.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"7.2.6\"}, {\"status\": \"affected\", \"version\": \"7.0.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"7.0.15\"}, {\"status\": \"affected\", \"version\": \"6.4.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.4.16\"}], \"defaultStatus\": \"unaffected\"}], \"solutions\": [{\"lang\": \"en\", \"value\": \"Upgrade to FortiOS version 7.4.2 or above\\nUpgrade to FortiOS version 7.2.7 or above\\nUpgrade to FortiOS version 7.0.16 or above\"}], \"references\": [{\"url\": \"https://fortiguard.com/psirt/FG-IR-23-301\", \"name\": \"https://fortiguard.com/psirt/FG-IR-23-301\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"An improper certificate validation vulnerability in Fortinet FortiOS 7.4.0 through 7.4.1, FortiOS 7.2.0 through 7.2.6, FortiOS 7.0.0 through 7.0.15, FortiOS 6.4 all versions\\t allows a remote and unauthenticated attacker to perform a Man-in-the-Middle attack on the FortiLink communication channel between the FortiOS device and FortiSwitch.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-295\", \"description\": \"Information disclosure\"}]}], \"providerMetadata\": {\"orgId\": \"6abe59d8-c742-4dff-8ce8-9b0ca1073da8\", \"shortName\": \"fortinet\", \"dateUpdated\": \"2026-01-14T09:15:43.682Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-47537\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-01-14T09:15:43.682Z\", \"dateReserved\": \"2023-11-06T10:35:25.828Z\", \"assignerOrgId\": \"6abe59d8-c742-4dff-8ce8-9b0ca1073da8\", \"datePublished\": \"2024-02-15T13:59:24.770Z\", \"assignerShortName\": \"fortinet\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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Detection rules are retrieved from Rulezet.

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Related by attack behaviour

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.


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