How severe is CVE-2006-6334?

CVE-2006-6334 has a CVSS 2.0 base score of 6.8, rated medium severity.

Is CVE-2006-6334 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 35% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2006-6334?

CVE-2006-6334 affects Citrix Presentation Server Client. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2006-6334?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2006-6334 published?

CVE-2006-6334 was published on 2006-12-08 and last updated on 2026-06-16.

CVE-2006-6334

CVE-2006-6334 is a medium-severity vulnerability in Citrix Presentation Server Client with a CVSS 2.0 base score of 6.8. Its EPSS exploit-prediction score of 35% places it in the 98th percentile, indicating an elevated likelihood of exploitation.

Key facts

Severity: Medium (CVSS 2.0 base score 6.8)
EPSS exploit prediction: 35% (98th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Citrix Presentation Server Client
Published: 2006-12-08
Last modified: 2026-06-16

Description

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.

Frequently asked questions

What is CVE-2006-6334?: 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.
How severe is CVE-2006-6334?: CVE-2006-6334 has a CVSS 2.0 base score of 6.8, rated medium severity.
Is CVE-2006-6334 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 35% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2006-6334?: CVE-2006-6334 affects Citrix Presentation Server Client. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2006-6334?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2006-6334 published?: CVE-2006-6334 was published on 2006-12-08 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:citrix:presentation_server_client:*:*:windows:*:*:*:*:*