Overview
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.
https://nvd.nist.gov/vuln/detail/CVE-2009-3129
Key Details
| Property | Value |
|---|---|
| CVE ID | CVE-2009-3129 |
| Vendor / Product | Microsoft — Excel |
| NVD Published | 2009-11-11 |
| NVD Last Modified | 2025-10-22 |
| CVSS 3.1 Score | 7.8 |
| CVSS 3.1 Vector | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| Severity | HIGH |
| CWE | CWE-787 |
| CISA KEV Added | 2022-03-03 |
| CISA KEV Deadline | 2022-03-24 |
| Known Ransomware Use | No |
CVSS 3.1 Breakdown
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Required Action
CISA BOD 22-01 Deadline: 2022-03-24.
Apply updates per vendor instructions.
Timeline
| Date | Event |
|---|---|
| 2022-03-03 | Added to CISA Known Exploited Vulnerabilities catalog |
| 2022-03-24 | CISA BOD 22-01 remediation deadline |
References
| Resource | Type |
|---|---|
| NVD — CVE-2009-3129 | Vulnerability Database |
| CISA KEV Catalog Entry | US Government |