NCSC-2026-0060

Vulnerability from csaf_ncscnl - Published: 2026-02-11 11:34 - Updated: 2026-02-11 11:34
Summary
Kwetsbaarheden verholpen in Fortinet FortiSandbox, FortiAuthenticator en FortiClient

Notes

The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this page to enhance access to its information and security advisories. The use of this security advisory is subject to the following terms and conditions: NCSC-NL makes every reasonable effort to ensure that the content of this page is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or continuous keeping up-to-date. The information contained in this security advisory is intended solely for the purpose of providing general information to professional users. No rights can be derived from the information provided therein. NCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of this security advisory. This includes damage resulting from the inaccuracy of incompleteness of the information contained in the advisory. This security advisory is subject to Dutch law. All disputes related to or arising from the use of this advisory will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings.
Feiten
Fortinet heeft kwetsbaarheden verholpen in FortiSandbox (versies 4.4.8 en 5.0.5), FortiAuthenticator (versies 6.3 tot 6.6.6) en FortiClient (versies 7.0, 7.2 en 7.4).
Interpretaties
De kwetsbaarheid in FortiSandbox betreft Cross-site Scripting, waardoor niet-geauthenticeerde aanvallers willekeurige commando's kunnen uitvoeren via speciaal gemaakte verzoeken. De kwetsbaarheid in FortiAuthenticator betreft een ontbrekende autorisatie die het mogelijk maakt voor alleen-lezen gebruikers om lokale gebruikersaccounts te wijzigen via een onbeveiligd bestand upload endpoint. De kwetsbaarheid in FortiClient stelt lokale aanvallers met lage privileges in staat om willekeurige bestandswijzigingen uit te voeren met verhoogde rechten door middel van speciaal gemaakte named pipe berichten, wat ongeautoriseerde toegang tot systeem bestanden mogelijk maakt.
Oplossingen
Fortinet heeft updates uitgebracht om de kwetsbaarheden te verhelpen. Zie bijgevoegde referenties voor meer informatie.
Kans
medium
Schade
high
CWE-79
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-862
Missing Authorization
CWE-59
Improper Link Resolution Before File Access ('Link Following')
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{
  "document": {
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE"
      }
    },
    "lang": "nl",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this page to enhance access to its information and security advisories. The use of this security advisory is subject to the following terms and conditions:\n\n    NCSC-NL makes every reasonable effort to ensure that the content of this page is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or continuous keeping up-to-date. The information contained in this security advisory is intended solely for the purpose of providing general information to professional users. No rights can be derived from the information provided therein.\n\n    NCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of this security advisory. This includes damage resulting from the inaccuracy of incompleteness of the information contained in the advisory.\n    This security advisory is subject to Dutch law. All disputes related to or arising from the use of this advisory will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings."
      },
      {
        "category": "description",
        "text": "Fortinet heeft kwetsbaarheden verholpen in FortiSandbox (versies 4.4.8 en 5.0.5), FortiAuthenticator (versies 6.3 tot 6.6.6) en FortiClient (versies 7.0, 7.2 en 7.4).",
        "title": "Feiten"
      },
      {
        "category": "description",
        "text": "De kwetsbaarheid in FortiSandbox betreft Cross-site Scripting, waardoor niet-geauthenticeerde aanvallers willekeurige commando\u0027s kunnen uitvoeren via speciaal gemaakte verzoeken. De kwetsbaarheid in FortiAuthenticator betreft een ontbrekende autorisatie die het mogelijk maakt voor alleen-lezen gebruikers om lokale gebruikersaccounts te wijzigen via een onbeveiligd bestand upload endpoint. De kwetsbaarheid in FortiClient stelt lokale aanvallers met lage privileges in staat om willekeurige bestandswijzigingen uit te voeren met verhoogde rechten door middel van speciaal gemaakte named pipe berichten, wat ongeautoriseerde toegang tot systeem bestanden mogelijk maakt.",
        "title": "Interpretaties"
      },
      {
        "category": "description",
        "text": "Fortinet heeft updates uitgebracht om de kwetsbaarheden te verhelpen. Zie bijgevoegde referenties voor meer informatie.",
        "title": "Oplossingen"
      },
      {
        "category": "general",
        "text": "medium",
        "title": "Kans"
      },
      {
        "category": "general",
        "text": "high",
        "title": "Schade"
      },
      {
        "category": "general",
        "text": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
        "title": "CWE-79"
      },
      {
        "category": "general",
        "text": "Missing Authorization",
        "title": "CWE-862"
      },
      {
        "category": "general",
        "text": "Improper Link Resolution Before File Access (\u0027Link Following\u0027)",
        "title": "CWE-59"
      }
    ],
    "publisher": {
      "category": "coordinator",
      "contact_details": "cert@ncsc.nl",
      "name": "Nationaal Cyber Security Centrum",
      "namespace": "https://www.ncsc.nl/"
    },
    "references": [
      {
        "category": "external",
        "summary": "Reference",
        "url": "https://fortiguard.fortinet.com/psirt/FG-IR-25-093"
      },
      {
        "category": "external",
        "summary": "Reference",
        "url": "https://fortiguard.fortinet.com/psirt/FG-IR-25-528"
      },
      {
        "category": "external",
        "summary": "Reference",
        "url": "https://fortiguard.fortinet.com/psirt/FG-IR-25-661"
      }
    ],
    "title": "Kwetsbaarheden verholpen in Fortinet FortiSandbox, FortiAuthenticator en FortiClient",
    "tracking": {
      "current_release_date": "2026-02-11T11:34:36.684955Z",
      "generator": {
        "date": "2025-08-04T16:30:00Z",
        "engine": {
          "name": "V.A.",
          "version": "1.3"
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      },
      "id": "NCSC-2026-0060",
      "initial_release_date": "2026-02-11T11:34:36.684955Z",
      "revision_history": [
        {
          "date": "2026-02-11T11:34:36.684955Z",
          "number": "1.0.0",
          "summary": "Initiele versie"
        }
      ],
      "status": "final",
      "version": "1.0.0"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:unknown/*",
                "product": {
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              }
            ],
            "category": "product_name",
            "name": "FortiAuthenticator"
          },
          {
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                "product": {
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            ],
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          },
          {
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            ],
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          }
        ],
        "category": "vendor",
        "name": "Fortinet"
      }
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  },
  "vulnerabilities": [
    {
      "cve": "CVE-2025-52436",
      "cwe": {
        "id": "CWE-79",
        "name": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)"
      },
      "notes": [
        {
          "category": "other",
          "text": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
          "title": "CWE-79"
        },
        {
          "category": "description",
          "text": "A Cross-site Scripting vulnerability in Fortinet FortiSandbox allows unauthenticated attackers to execute commands via crafted requests, addressed in versions 4.4.8 and 5.0.5.",
          "title": "Summary"
        }
      ],
      "product_status": {
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          "CSAFPID-2",
          "CSAFPID-3",
          "CSAFPID-4"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2025-52436 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2025/cve-2025-52436.json"
        }
      ],
      "scores": [
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2",
            "CSAFPID-3",
            "CSAFPID-4"
          ]
        }
      ],
      "title": "CVE-2025-52436"
    },
    {
      "cve": "CVE-2026-21743",
      "cwe": {
        "id": "CWE-862",
        "name": "Missing Authorization"
      },
      "notes": [
        {
          "category": "other",
          "text": "Missing Authorization",
          "title": "CWE-862"
        },
        {
          "category": "description",
          "text": "A vulnerability in Fortinet FortiAuthenticator versions 6.3 to 6.6.6 allows read-only users to modify local users via an unprotected file upload endpoint due to missing authorization.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
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          "CSAFPID-2",
          "CSAFPID-3",
          "CSAFPID-4"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-21743 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-21743.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.2,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2",
            "CSAFPID-3",
            "CSAFPID-4"
          ]
        }
      ],
      "title": "CVE-2026-21743"
    },
    {
      "cve": "CVE-2025-62676",
      "cwe": {
        "id": "CWE-59",
        "name": "Improper Link Resolution Before File Access (\u0027Link Following\u0027)"
      },
      "notes": [
        {
          "category": "other",
          "text": "Improper Link Resolution Before File Access (\u0027Link Following\u0027)",
          "title": "CWE-59"
        },
        {
          "category": "description",
          "text": "A vulnerability in Fortinet FortiClient versions 7.0, 7.2, and 7.4 allows local low-privilege attackers to perform arbitrary file writes with elevated permissions via crafted named pipe messages.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
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          "CSAFPID-2",
          "CSAFPID-3",
          "CSAFPID-4"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2025-62676 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2025/cve-2025-62676.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2",
            "CSAFPID-3",
            "CSAFPID-4"
          ]
        }
      ],
      "title": "CVE-2025-62676"
    }
  ]
}


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Sightings

Author Source Type Date

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.
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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.