CISA KEV

CVE-2009-3129

Microsoft Excel Featheader Record Memory Corruption Vulnerability

Microsoft Office Excel 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.

VendorMicrosoft

ProductExcel

EPSS85.7%

Added to KEVMar 03, 2022

Remediation DueMar 24, 2022

Known Ransomware UseUnknown

CWECWE-94

Required Action

Apply updates per vendor instructions.

From Disclosure to Action

Know how quickly you need to move.

For CVE-2009-3129, added to the catalogue on Mar 03, 2022 with a remediation deadline of Mar 24, 2022.

Added to KEVMar 03, 2022

Seraph AlertSame day

Remediation DueMar 24, 2022

ValidationOngoing

Overdue1679 days overdue

Recommended action: Apply vendor remediation guidance.

Seraph Context

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Exploitation Context

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References

https://nvd.nist.gov/vuln/detail/CVE-2009-3129

More from Microsoft in the KEV catalogue.

CVE-2019-1068SQL ServerAdded Aug 26, 2026 CVE-2026-55040SharePointAdded Aug 18, 2026 CVE-2026-33824Internet Key Exchange (IKE) Service ExtensionsAdded Aug 18, 2026

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