CVE-2003-0347
CriticalPublic exploitHeap-based buffer overflow in VBE.DLL and VBE6.DLL of Microsoft Visual Basic for Applications (VBA) SDK 5.0 through 6.3 allows remote attackers to execute arbitrary code via a document with a long ID parameter.
Published Oct 20, 2003 · Updated Apr 15, 2026
Key Facts
Patch immediately- CVE-2003-0347 is a critical-severity vulnerability (CVSS 10.0 v2) affecting Office (Microsoft), Project (Microsoft), Visio (Microsoft) and 1 more product.
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 55% 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 it is very likely to be exploited soon.
CVSS v2
10.0
AV:N/AC:L/Au:N/C:C/I:C/A:C
EPSS (30-day exploit likelihood)
55%
Higher than 99.0% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2003-0347 brief as a PDF
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Description
Heap-based buffer overflow in VBE.DLL and VBE6.DLL of Microsoft Visual Basic for Applications (VBA) SDK 5.0 through 6.3 allows remote attackers to execute arbitrary code via a document with a long ID parameter.
Affected Products
13 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| OfficeMicrosoft | 2000, 2000-sp2, 2000-sp3, xp, xp-sp1, xp-sp2 | n/a |
| ProjectMicrosoft | 2000, 2002 | n/a |
| VisioMicrosoft | 2002 | n/a |
| Visual BasicMicrosoft | 5.0, 6.2, 6.3 | n/a |
Timeline
Publicly disclosed
Oct 20, 2003
Last updated
Apr 15, 2026
References
- patch8534
- exploitExploitDB-23094
- other20030903 EEYE: VBE Document Property Buffer Overflow
- other20030903 EEYE: VBE Document Property Buffer Overflow
- otherMS03-037
FAQ
Common Questions.
Heap-based buffer overflow in VBE.DLL and VBE6.DLL of Microsoft Visual Basic for Applications (VBA) SDK 5.0 through 6.3 allows remote attackers to execute arbitrary code via a document with a long ID parameter.
Affected: Office (Microsoft) versions 2000, 2000-sp2, 2000-sp3, xp, xp-sp1, xp-sp2; Project (Microsoft) versions 2000, 2002; Visio (Microsoft) versions 2002, 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 it is very likely to be exploited soon.
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