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CVE-2026-96257

Estado: AplazadaCrítica (9.3)—

A flaw has been found in Fast FAC1203R Gigabit Edition 2.0.4. Affected by this issue is the function copy_msg_element of the component Device Discovery Service. Executing a manipulation can lead to stack-based buffer overflow. The attack can be executed remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Stack buffer overflow en servicio remoto sin autenticación (AV:N, PR:N, UI:N) permite ejecución remota de código. CWE-119/121 confirman desbordamiento de buffer con potencial RCE.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Filter Network TrafficVulnerability ScanningRestrict Web-Based ContentPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over Network

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Fast — Fac1203r Gigabit EditionAI

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-96257",
  "cveTags": [],
  "metrics": {
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        "ssvcData": {
          "id": "CVE-2026-96257",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
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            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
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          ],
          "version": "2.0.3",
          "timestamp": "2026-09-23T14:06:54.550015Z"
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    "cvssMetricV2": [
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          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:C/I:C/A:C",
          "authentication": "NONE",
          "integrityImpact": "COMPLETE",
          "accessComplexity": "LOW",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "COMPLETE"
        },
        "acInsufInfo": false,
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        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
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    ],
    "cvssMetricV31": [
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        "type": "Secondary",
        "source": "cna@vuldb.com",
        "cvssData": {
          "scope": "CHANGED",
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    "cvssMetricV40": [
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        "type": "Secondary",
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        "cvssData": {
          "Safety": "NOT_DEFINED",
          "version": "4.0",
          "Recovery": "NOT_DEFINED",
          "baseScore": 9.3,
          "Automatable": "NOT_DEFINED",
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "valueDensity": "NOT_DEFINED",
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          "exploitMaturity": "PROOF_OF_CONCEPT",
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          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
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          "availabilityRequirement": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
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          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
        }
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  },
  "affected": [
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      "affectedData": [
        {
          "cpes": [
            "cpe:2.3:a:fast:fac1203r_gigabit_edition:*:*:*:*:*:*:*:*"
          ],
          "vendor": "Fast",
          "modules": [
            "Device Discovery Service"
          ],
          "product": "FAC1203R Gigabit Edition",
          "versions": [
            {
              "status": "affected",
              "version": "2.0.4"
            }
          ]
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  "published": "2026-09-23T03:17:06.077",
  "references": [
    {
      "url": "https://github.com/xiaobor123/vuls-find-VxWorks/tree/main/vul-find-FAST_FAC1203R-copy_msg_element",
      "source": "cna@vuldb.com"
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      "url": "https://vuldb.com/cve/CVE-2026-96257",
      "source": "cna@vuldb.com"
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    {
      "url": "https://vuldb.com/submit/901889",
      "source": "cna@vuldb.com"
    },
    {
      "url": "https://vuldb.com/vuln/408707",
      "source": "cna@vuldb.com"
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    {
      "url": "https://vuldb.com/vuln/408707/cti",
      "source": "cna@vuldb.com"
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  "weaknesses": [
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      "description": [
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          "value": "CWE-119"
        },
        {
          "lang": "en",
          "value": "CWE-121"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw has been found in Fast FAC1203R Gigabit Edition 2.0.4. Affected by this issue is the function copy_msg_element of the component Device Discovery Service. Executing a manipulation can lead to stack-based buffer overflow. The attack can be executed remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way."
    }
  ],
  "lastModified": "2026-09-23T15:17:31.920",
  "sourceIdentifier": "cna@vuldb.com"
}