What is CVE-2016-6493?

CVE-2016-6493 is a critical-severity vulnerability in Citrix Xenapp, classified under CWE-254. CVSS score: 9.8/10. Published 2016-08-19.

How severe is CVE-2016-6493?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Citrix Xenapp

CVE-2016-6493

Citrix XenApp 6.x before 6.5 HRP07 and 7.x before 7.9 and Citrix XenDesktop before 7.9 might allow attackers to weaken an unspecified security mitigation via vectors related to memory permission.

Published 2016-08-19 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.022 (81.7th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 82nd percentile — 81.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.022 · newest: 0.022 · change: 0.000

Affected products

Citrix Xenapp — versions 6.0.0.0, 6.5.0.0, 7.0.0.0
Citrix Xendesktop

Weakness classification (CWE)

CWE-254

References

www.securitytracker.com/id/1036539 (VDB Entry, Third Party Advisory, vdb-entry)
www.securityfocus.com/bid/92316 (VDB Entry, Third Party Advisory, vdb-entry)
support.citrix.com/article/CTX215460 (Vendor Advisory)

Frequently asked questions

What is CVE-2016-6493?: CVE-2016-6493 is a critical-severity vulnerability in Citrix Xenapp, classified under CWE-254. CVSS score: 9.8/10. Published 2016-08-19.
How severe is CVE-2016-6493?: Critical severity. CVSS v3 base score is 9.8 out of 10.