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CVE-2009-3129: Microsoft Excel Featheader Record Memory Corruption Vulnerability

criticalknown exploitedpublic exploitCVE-2009-3129
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
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.

CSIRTS triage

vendor: Microsoftproduct: ExcelRemote code executionMemory corruption
What
A memory corruption vulnerability allows remote attackers to execute arbitrary code via a specially crafted spreadsheet.
Who is affected
Users of Microsoft Excel are affected by this vulnerability.
Urgency
Remediation is urgent due to active exploitation and critical severity.
Action
Apply the latest security updates from Microsoft.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2022-03-03
Exploitation
Observed in the wild (CISA KEV)

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

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2009-3129coverage & exploitation statusNVD · CVE.org

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