CVE-2009-3129

highpriority · act · 90OT risk · criticalKEV · exploitedEPSS 0.840 · 100 %ileexploit · functionalEURUUS

grimoire priorityP0 · Act now

Exploitable?

Yes · in the wild

CISA KEV · 3 exploits · functional

Likely / severe?

84.0% (100th) EPSS

CVSS 9.3 · high

Is it mine?

19 products

Check your exposure

Who says so?

3 sources

enisa_euvd · fstec_bdu · nvd

added 2022-03-03remediate by 2022-03-24

required action Apply updates per vendor instructions.

EPSS · scored 2026-10-26

Microsoft Excel Featheader Record Memory Corruption Vulnerability

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

Technical severity, 0–10. One row per scoring source.

9.6

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.8–9.6

v2.09.3highAV:N/AC:M/Au:N/C:C/I:C/A:Cprimary · NVD / NIST USexploitability 8.6 · impact 10

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 1.8 · impact 5.9

v3.19.6criticalAV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · ENISA EU

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondaryexploitability 1.8 · impact 5.9

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:Hsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: active · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-787USprimaryCWE-823USCWE-94US

exploits (3)

Public proof-of-concept and weaponised exploit code.

EDB-16625Microsoft Excel - Malformed FEATHEADER Record (MS09-067) (Metasploit)functional · exploit_db
exploit/windows/fileformat/ms09_067_excel_featheaderMS09-067 Microsoft Excel Malformed FEATHEADER Record Vulnerabilityfunctional · metasploit
EDB-14706Microsoft Excel - FEATHEADER Record (MS09-067)PoC · exploit_db

affected products (19)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
Microsoft Corp Microsoft Excel Viewer 2003 Service Pack 3all versionsfstec_bduRU
Microsoft Corp Microsoft Excel Viewer Service Pack 1all versionsfstec_bduRU
Microsoft Corp Microsoft Excel Viewer Service Pack 2all versionsfstec_bduRU
Microsoft Corp Microsoft Officeall versionsfstec_bduRU
Microsoft Corp Microsoft Office 2003 Service Pack 3all versionsfstec_bduRU
Microsoft Corp Microsoft Office 2004all versionsfstec_bduRU
Microsoft Corp Microsoft Office 2007 Service Pack 1all versionsfstec_bduRU
Microsoft Corp Microsoft Office 2007 Service Pack 2all versionsfstec_bduRU
Microsoft Corp Microsoft Office 2008all versionsfstec_bduRU
Microsoft Corp Open XML File Format Converterall versionsfstec_bduRU
microsoft excel= 2002nvdUScpe:2.3:a:microsoft:excel:*:*:*:*:*:*:*:*
microsoft excel= 2003nvdUScpe:2.3:a:microsoft:excel:*:*:*:*:*:*:*:*
microsoft excel= 2007nvdUScpe:2.3:a:microsoft:excel:*:*:*:*:*:*:*:*
microsoft excel viewerall versionsnvdUScpe:2.3:a:microsoft:excel_viewer:*:*:*:*:*:*:*:*
microsoft excel viewer= 2003nvdUScpe:2.3:a:microsoft:excel_viewer:*:*:*:*:*:*:*:*
microsoft office= 2004nvdUScpe:2.3:a:microsoft:office:*:*:*:*:*:*:*:*
microsoft office= 2008nvdUScpe:2.3:a:microsoft:office:*:*:*:*:*:*:*:*
microsoft open xml file format converterall versionsnvdUScpe:2.3:a:microsoft:open_xml_file_format_converter:*:*:*:*:*:*:*:*

also known as (5)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

enisa_euvd fstec_bdu nvd NVD CVE.org MITRE

published 2009-11-11modified 2026-06-16

related (16,099)

Related entries.

ID	severity	EPSS	exploitable	published
CVE-2026-86950US	—OT critical	26.2% (98th)	KEV	2026-09-28
An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 18.7.11 and iPadOS 18.7.11, iOS 26.7.1 and iPadOS 26.7.1, macOS Sequoia 15.8.1,…
CVE-2026-87491US	—OT critical	3.51% (89th)	KEV	2026-09-09
Out of bounds write in V8 in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security…
CVE-2026-53362US	—OT critical	0.71% (53rd)	KEV	2026-07-04
In the Linux kernel, the following vulnerability has been resolved: ipv6: account for fraggap on the paged allocation path In __ip6_append_data(), when the paged-allocation branc…
CVE-2026-53266US	—OT critical	0.93% (61st)	KEV	2026-06-25
In the Linux kernel, the following vulnerability has been resolved: netfilter: bridge: make ebt_snat ARP rewrite writable The ebtables SNAT target keeps the Ethernet source addre…
CVE-2026-11645US	—OT critical	2.44% (84th)	KEV	2026-06-09
Out of bounds read and write in V8 in Google Chrome prior to 149.0.7827.103 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium…

+16094 more

references (21)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan