CVE-2007-0031Excel Vulnerability
Heap-based buffer overflow in Microsoft Excel 2000 SP3, 2002 SP3, 2003 SP2, 2004 for Mac, and v.X for Mac allows user-assisted remote attackers to execute arbitrary code via a BIFF8 spreadsheet with a PALETTE record that contains a large number of entries.
Published Jan 9, 2007 · Updated Apr 22, 2026
Key Facts
Patch immediately- CVE-2007-0031 is a critical-severity vulnerability (CVSS 9.3 v2) affecting Excel (Microsoft), Excel Viewer (Microsoft), Office (Microsoft) and 1 more product.
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 42% probability of exploitation in the next 30 days.
- No fixed version is listed yet; check the vendor advisory for mitigations.
- Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Scores
CVSS v2
9.3
AV:N/AC:M/Au:N/C:C/I:C/A:C
EPSS (30-day exploit likelihood)
42%
Higher than 98.6% of all scored CVEs
Exploit maturity
Proof of concept
ATLAS score
39/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Not listed
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Proof of concept
Public exploit code
1
Proof-of-concept links
In-the-wild evidence
0
Reports of active use
Advisories And Exploit References
Description
Heap-based buffer overflow in Microsoft Excel 2000 SP3, 2002 SP3, 2003 SP2, 2004 for Mac, and v.X for Mac allows user-assisted remote attackers to execute arbitrary code via a BIFF8 spreadsheet with a PALETTE record that contains a large number of entries.
Affected Products
11 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| ExcelMicrosoft | 2000, 2002, 2003 | n/a |
| Excel ViewerMicrosoft | 2003 | n/a |
| OfficeMicrosoft | 2000-sp3, 2003-sp2, 2004, v.x, xp-sp3 | n/a |
| WorksMicrosoft | 2004, 2005 | n/a |
Timeline
Publicly disclosed
Jan 9, 2007
Last updated
Apr 22, 2026
References
- patch20070109 Microsoft Excel Long Palette Heap Overflow Vulnerability
- exploitExploitDB-3193
- otherMS07-002
- other1017487
- otheroval:org.mitre.oval:def:753
FAQ
Common Questions.
Heap-based buffer overflow in Microsoft Excel 2000 SP3, 2002 SP3, 2003 SP2, 2004 for Mac, and v.X for Mac allows user-assisted remote attackers to execute arbitrary code via a BIFF8 spreadsheet with a PALETTE record that contains a large number of entries.
Affected: Excel (Microsoft) versions 2000, 2002, 2003; Excel Viewer (Microsoft) versions 2003; Office (Microsoft) versions 2000-sp3, 2003-sp2, 2004, v.x, xp-sp3, among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Is CVE-2007-0031 On Your Attack Surface?
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