CVE-2009-3129

Estado: AnalizadaAlta (7.8)⚠ Explotación activa

Microsoft Office Excel 2002 SP3, 2003 SP3, and 2007 SP1 and SP2; Office 2004 and 2008 for Mac; Open XML File Format Converter for Mac; Office Excel Viewer 2003 SP3; Office Excel Viewer SP1 and SP2; and Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats SP1 and SP2 allows remote attackers to execute arbitrary code via a spreadsheet with a FEATHEADER record containing an invalid cbHdrData size element that affects a pointer offset, aka "Excel Featheader Record Memory Corruption Vulnerability."

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Puntuación base: 7.8

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 84%
Percentil entre todas las CVEs puntuadas: 100
Fecha de la puntuación: 2/10/2026

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).

CISA KEV — explotada activamente

Añadida al catálogo: 3/3/2022
Plazo de remediación: 24/3/2022
Uso conocido en ransomware: Unknown

🎯 Técnicas ATT&CK

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

ExplotaciónT1203 Exploitation for Client Executionexecution75 %
Impacto principalT1059 Command and Scripting Interpreterexecution85 %
Impacto secundarioT1005 Data from Local Systemcollection60 %

Vector AV:L/UI:R indica archivo local con interacción usuario (apertura Excel). FEATHEADER corruption permite ejecución de código arbitrario. Ransomware histórico explotó Excel para ejecutar payloads.

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

Restrict Web-Based Content Privileged Account Management Limit Software Installation Execution Prevention Behavior Prevention on Endpoint Disable or Remove Feature or Program

Tecnologías afectadas (4)

Microsoft — Excel Microsoft — Excel Viewer Microsoft — Office Microsoft — Open XML File Format Converter

CWE

CWE-787
CWE-787

Referencias

JSON original (NVD)

Mostrar

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  "descriptions": [
    {
      "lang": "en",
      "value": "Microsoft Office Excel 2002 SP3, 2003 SP3, and 2007 SP1 and SP2; Office 2004 and 2008 for Mac; Open XML File Format Converter for Mac; Office Excel Viewer 2003 SP3; Office Excel Viewer SP1 and SP2; and Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats SP1 and SP2 allows remote attackers to execute arbitrary code via a spreadsheet with a FEATHEADER record containing an invalid cbHdrData size element that affects a pointer offset, aka \"Excel Featheader Record Memory Corruption Vulnerability.\""
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    {
      "lang": "es",
      "value": "Office Excel 2002 SP3, 2003 SP3 y 2007 SP1 y SP2; Office 2004 y 2008 para Mac; Open XML File Format Converter para Mac; Office Excel Viewer 2003 SP3; Office Excel Viewer SP1 y SP2; y Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats SP1 y SP2, de Microsoft, permite a los atacantes remotos ejecutar código arbitrario por medio de una hoja de cálculo con un registro FEATHEADER que contiene un elemento de tamaño cbHdrData no válido que afecta a un desplazamiento del puntero, también se conoce como \"Excel Featheader Record Memory Corruption Vulnerability\"."
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  "lastModified": "2026-06-16T23:11:00.237",
  "cisaActionDue": "2022-03-24",
  "cisaExploitAdd": "2022-03-03",
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}