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CVE-2016-6493

30
FAUCET Score

CVE-2016-6493 is a critical vulnerability affecting Citrix XenApp versions 6.x before 6.5 HRP07 and 7.x before 7.9, as well as Citrix XenDesktop before 7.9. This flaw, related to memory permission, could allow attackers to weaken an unspecified security mitigation. With a CVSS score of 9.8 (CRITICAL), it presents a high risk due to its network-based attack vector, low attack complexity, and potential for complete compromise of confidentiality, integrity, and availability. While there is no evidence of active exploitation, public exploit code, or KEV listing, the vulnerability has garnered significant community discussion, indicating awareness within the cybersecurity community.

Impacted Technologies

VendorProductVersion(s)CPE
6.0.0.0CPE matchmatch criteria
cpe:2.3:a:citrix:xenapp:6.0.0.0:*:*:*:*:*:*:*
6.5.0.0CPE matchmatch criteria
cpe:2.3:a:citrix:xenapp:6.5.0.0:*:*:*:*:*:*:*
7.0.0.0CPE matchmatch criteria
cpe:2.3:a:citrix:xenapp:7.0.0.0:*:*:*:*:*:*:*
7.1.0.0CPE matchmatch criteria
cpe:2.3:a:citrix:xenapp:7.1.0.0:*:*:*:*:*:*:*
7.5.0.0CPE matchmatch criteria
cpe:2.3:a:citrix:xenapp:7.5.0.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.19%
Probability of exploitation in next 30 days
EPSS Percentile
80.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0219 is in the 70th percentile among its peer group of 36,833 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

citrixvendor investigatingvia nvd_reference
View patch

References

support.citrix.com / article/CTX215460
Vendor Advisory
securityfocus.com / bid/92316
Third Party AdvisoryVDB Entry
securitytracker.com / id/1036539
Third Party AdvisoryVDB Entry