Skip to content
Fencer Vulns
medium 6.8

CVE-2006-6334 json

Heap-based buffer overflow in the SendChannelData function in wfica.ocx in Citrix Presentation Server Client before 9.230 for Windows allow…

published 2006-12-08 19 y ago modified 2026-06-16 4 mo ago also EUVD-2006-6317

cvss
6.8
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
36.6%
EPSS 36.6% chance of exploitation in 30 days, percentile 98%
public exploits
1
Exploit-DB

Summary

Heap-based buffer overflow in the SendChannelData function in wfica.ocx in Citrix Presentation Server Client before 9.230 for Windows allows remote malicious web sites to execute arbitrary code via a DataSize parameter that is less than the length of the Data buffer.

Patch / fix

Timeline

  1. Published
  2. First public exploit (EDB-5106)

Exploit prediction

36.63% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-5106 Citrix Presentation Server Client - 'WFICA.OCX' ActiveX Heap Buffer Overflow remote, 2008-02-12
  • tippingpoint.com http://www.tippingpoint.com/security/advisories/TSRT-06-15.html referenced PoC, tagged "exploit" by a source, unverified
  • support.citrix.com http://support.citrix.com/article/CTX111827 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

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.