A certain ActiveX control in (1) OScan8.ocx and (2) Oscan81.ocx in BitDefender Online Anti-Virus Scanner 8.0 allows remote attackers to exe…

published 2007-11-30 18 y ago modified 2026-06-16 4 mo ago also EUVD-2007-6157

cvss: 9.3; version 2.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 8.1%; EPSS 8.1% chance of exploitation in 30 days, percentile 94%
public exploits: 1; Exploit-DB

A certain ActiveX control in (1) OScan8.ocx and (2) Oscan81.ocx in BitDefender Online Anti-Virus Scanner 8.0 allows remote attackers to execute arbitrary code via a long argument to the InitX method that begins with a "%%" sequence, which is misinterpreted as a Unicode string and decoded twice, leading to improper memory allocation and a heap-based buffer overflow.

Patch / fix

links 1

secunia.com/advisories/27717 advisory

Timeline

2007-11-27 First public exploit (EDB-4663)
2007-11-30 Published

Exploit prediction

8.08% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

EDB-4663 BitDefender Online Scanner 8 - ActiveX Heap Overflow remote, 2007-11-27

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

secunia.com /advisories/27717
third-party-advisory, patch, vendor-advisory
exploit-db.com /exploits/4663
exploit
securitytracker.com /id?1018986
vdb-entry
research.eeye.com /html/advisories/published/AD20071120.html
securityreason.com /securityalert/3405
third-party-advisory
vupen.com /english/advisories/2007/3935
vdb-entry
securityfocus.com /archive/1/483986/100/100/threaded
mailing-list

Sources

CVE List CVE-2007-6189
NVD CVE-2007-6189

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.

Summary