CVE-2009-0557

Status: AnalyzedHigh (7.8)⚠ Active exploitation

Excel in Microsoft Office 2000 SP3, Office XP SP3, Office 2003 SP3, and Office 2004 and 2008 for Mac; Excel in 2007 Microsoft Office System SP1 and SP2; Open XML File Format Converter for Mac; Microsoft Office Excel Viewer 2003 SP3; Microsoft Office Excel Viewer; and Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats SP1 and SP2 allow remote attackers to execute arbitrary code via a crafted Excel file with a malformed record object, aka "Object Record Corruption Vulnerability."

CVSS

Version: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Base score: 7.8

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 53%
Percentile among all scored CVEs: 99
Score date: 10/6/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

CISA KEV — actively exploited

Added to catalog: 6/8/2022
Remediation due date: 6/22/2022
Known ransomware use: Unknown

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

ExploitationT1203 Exploitation for Client Executionexecution75 %
Primary impactT1059 Command and Scripting Interpreterexecution85 %
Secondary impactT1005 Data from Local Systemcollection60 %

Archivo Excel malformado requiere interacción del usuario (UI:R) para ejecutar código arbitrario. CWE-94 indica inyección de código. Vector AV:L con UI:R sugiere T1203 (explotación en cliente); impacto primario es ejecución de comandos (T1059) confirmada por "execute arbitrary code".

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

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

Affected technologies (5)

Microsoft — Office Microsoft — Office Compatibility Pack Microsoft — Office Excel Viewer Microsoft — Office Sharepoint Server Microsoft — Open XML File Format Converter

CWEs

CWE-94
CWE-94

References

Raw JSON (NVD)

Show

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