CERTFR-2026-AVI-0443

Vulnerability from certfr_avis - Published: 2026-04-15 - Updated: 2026-04-15

De multiples vulnérabilités ont été découvertes dans Microsoft .Net. Elles permettent à un attaquant de provoquer un déni de service à distance et un contournement de la politique de sécurité.

Solutions

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

Impacted products
Vendor Product Description
Microsoft .Net .NET 8.0 versions antérieures à 8.0.26
Microsoft .Net Microsoft .NET Framework 3.5 versions antérieures à 2.0.50727.8982 et 3.0.30729.8976
Microsoft .Net .NET 8.0 installé sur Windows versions antérieures à 8.0.26
Microsoft .Net Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 versions antérieures à 4.7.4141.0
Microsoft .Net Microsoft .NET Framework 3.5 et 4.8.1 versions antérieures à 2.0.50727.9181, 3.0.30729.9165 et 4.8.9332.0
Microsoft .Net Microsoft .NET Framework 3.5 et 4.8 versions antérieures à 2.0.50727.9181, 3.0.30729.9165 et 4.8.4801.0
Microsoft .Net .NET 10.0 installé sur Linux versions antérieures à 10.0.6
Microsoft .Net .NET 8.0 installé sur Linux versions antérieures à 8.0.26
Microsoft .Net .NET 9.0 installé sur Mac OS versions antérieures à 9.0.15
Microsoft .Net .NET 10.0 installé sur Windows versions antérieures à 10.0.6
Microsoft .Net Microsoft .NET Framework 3.5 et 4.7.2 versions antérieures à 2.0.50727.9068, 3.0.30729.9065 et 4.7.4141.0
Microsoft .Net .NET 8.0 installé sur Mac OS versions antérieures à 8.0.26
Microsoft .Net Microsoft .NET Framework 3.5 et 4.8 versions antérieures à 2.0.50727.9068, 3.0.30729.9065 et 4.8.4801.0
Microsoft .Net .NET 9.0 installé sur Linux versions antérieures à 9.0.15
Microsoft .Net .NET 9.0 installé sur Windows versions antérieures à 9.0.15
Microsoft .Net Microsoft .NET Framework 4.8 versions antérieures à 4.8.4801.0
Microsoft .Net .NET 10.0 installé sur Mac OS versions antérieures à 10.0.6
References

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{
  "$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
  "affected_systems": [
    {
      "description": ".NET 8.0 versions ant\u00e9rieures \u00e0 8.0.26",
      "product": {
        "name": ".Net",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": "Microsoft .NET Framework 3.5 versions ant\u00e9rieures \u00e0 2.0.50727.8982 et 3.0.30729.8976",
      "product": {
        "name": ".Net",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": ".NET 8.0 install\u00e9 sur Windows versions ant\u00e9rieures \u00e0 8.0.26",
      "product": {
        "name": ".Net",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": "Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 versions ant\u00e9rieures \u00e0 4.7.4141.0",
      "product": {
        "name": ".Net",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": "Microsoft .NET Framework 3.5 et 4.8.1 versions ant\u00e9rieures \u00e0 2.0.50727.9181, 3.0.30729.9165 et 4.8.9332.0",
      "product": {
        "name": ".Net",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": "Microsoft .NET Framework 3.5 et 4.8 versions ant\u00e9rieures \u00e0 2.0.50727.9181, 3.0.30729.9165 et 4.8.4801.0",
      "product": {
        "name": ".Net",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": ".NET 10.0 install\u00e9 sur Linux versions ant\u00e9rieures \u00e0 10.0.6",
      "product": {
        "name": ".Net",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": ".NET 8.0 install\u00e9 sur Linux versions ant\u00e9rieures \u00e0 8.0.26",
      "product": {
        "name": ".Net",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": ".NET 9.0 install\u00e9 sur Mac OS versions ant\u00e9rieures \u00e0 9.0.15",
      "product": {
        "name": ".Net",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": ".NET 10.0 install\u00e9 sur Windows versions ant\u00e9rieures \u00e0 10.0.6",
      "product": {
        "name": ".Net",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": "Microsoft .NET Framework 3.5 et 4.7.2 versions ant\u00e9rieures \u00e0 2.0.50727.9068, 3.0.30729.9065 et 4.7.4141.0",
      "product": {
        "name": ".Net",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": ".NET 8.0 install\u00e9 sur Mac OS versions ant\u00e9rieures \u00e0 8.0.26",
      "product": {
        "name": ".Net",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": "Microsoft .NET Framework 3.5 et 4.8 versions ant\u00e9rieures \u00e0 2.0.50727.9068, 3.0.30729.9065 et 4.8.4801.0",
      "product": {
        "name": ".Net",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": ".NET 9.0 install\u00e9 sur Linux versions ant\u00e9rieures \u00e0 9.0.15",
      "product": {
        "name": ".Net",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": ".NET 9.0 install\u00e9 sur Windows versions ant\u00e9rieures \u00e0 9.0.15",
      "product": {
        "name": ".Net",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": "Microsoft .NET Framework 4.8 versions ant\u00e9rieures \u00e0 4.8.4801.0",
      "product": {
        "name": ".Net",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": ".NET 10.0 install\u00e9 sur Mac OS versions ant\u00e9rieures \u00e0 10.0.6",
      "product": {
        "name": ".Net",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    }
  ],
  "affected_systems_content": "",
  "content": "## Solutions\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des correctifs (cf. section Documentation).",
  "cves": [
    {
      "name": "CVE-2026-26171",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-26171"
    },
    {
      "name": "CVE-2026-32203",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-32203"
    },
    {
      "name": "CVE-2026-33116",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-33116"
    },
    {
      "name": "CVE-2026-32178",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-32178"
    },
    {
      "name": "CVE-2026-23666",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-23666"
    },
    {
      "name": "CVE-2026-32226",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-32226"
    }
  ],
  "initial_release_date": "2026-04-15T00:00:00",
  "last_revision_date": "2026-04-15T00:00:00",
  "links": [],
  "reference": "CERTFR-2026-AVI-0443",
  "revisions": [
    {
      "description": "Version initiale",
      "revision_date": "2026-04-15T00:00:00.000000"
    }
  ],
  "risks": [
    {
      "description": "D\u00e9ni de service \u00e0 distance"
    },
    {
      "description": "Contournement de la politique de s\u00e9curit\u00e9"
    }
  ],
  "summary": "De multiples vuln\u00e9rabilit\u00e9s ont \u00e9t\u00e9 d\u00e9couvertes dans Microsoft .Net. Elles permettent \u00e0 un attaquant de provoquer un d\u00e9ni de service \u00e0 distance et un contournement de la politique de s\u00e9curit\u00e9.",
  "title": "Multiples vuln\u00e9rabilit\u00e9s dans Microsoft .Net",
  "vendor_advisories": [
    {
      "published_at": "2026-04-14",
      "title": "Bulletin de s\u00e9curit\u00e9 Microsoft .Net CVE-2026-32178",
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32178"
    },
    {
      "published_at": "2026-04-14",
      "title": "Bulletin de s\u00e9curit\u00e9 Microsoft .Net CVE-2026-33116",
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33116"
    },
    {
      "published_at": "2026-04-14",
      "title": "Bulletin de s\u00e9curit\u00e9 Microsoft .Net CVE-2026-32203",
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32203"
    },
    {
      "published_at": "2026-04-14",
      "title": "Bulletin de s\u00e9curit\u00e9 Microsoft .Net CVE-2026-32226",
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32226"
    },
    {
      "published_at": "2026-04-14",
      "title": "Bulletin de s\u00e9curit\u00e9 Microsoft .Net CVE-2026-26171",
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26171"
    },
    {
      "published_at": "2026-04-14",
      "title": "Bulletin de s\u00e9curit\u00e9 Microsoft .Net CVE-2026-23666",
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-23666"
    }
  ]
}


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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.
  • 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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