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Fencer Vulns
critical 9.3

CVE-2008-4255 in the critical feed json

Heap-based buffer overflow in mscomct2.ocx (aka Windows Common ActiveX control or Microsoft Animation ActiveX control) in Microsoft Visual…

published 2008-12-10 17 y ago modified 2026-06-16 4 mo ago also EUVD-2008-4238

cvss
9.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
53.7%
EPSS 53.7% chance of exploitation in 30 days, percentile 99%
public exploits
1
Exploit-DB

Summary

Heap-based buffer overflow in mscomct2.ocx (aka Windows Common ActiveX control or Microsoft Animation ActiveX control) in Microsoft Visual Basic 6.0, Visual Studio .NET 2002 SP1 and 2003 SP1, Visual FoxPro 8.0 SP1 and 9.0 SP1 and SP2, and Office Project 2003 SP3 and 2007 Gold and SP1 allows remote attackers to execute arbitrary code via an AVI file with a crafted stream length, which triggers an "allocation error" and memory corruption, aka "Windows Common AVI Parsing Overflow Vulnerability."

Patch / fix

Timeline

  1. Published
  2. First public exploit (EDB-7431)

Exploit prediction

53.70% chance of exploitation in the next 30 days, higher than 99% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-7431 Microsoft Visual Basic - ActiveX Controls mscomct2.ocx Buffer Overflow (PoC) dos, 2008-12-12
  • downloads.securityfocus.com http://downloads.securityfocus.com/vulnerabilities/exploits/32613.pl referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 9.3 AV:N/AC:M/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.