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CVE-2017-17549

21
FAUCET Score

CVE-2017-17549 is a sensitive information disclosure vulnerability affecting Citrix NetScaler Application Delivery Controller (ADC) and NetScaler Gateway versions 10.5, 11.0, 11.1, and 12.0 prior to specific builds. The vulnerability allows remote attackers to extract sensitive data from backend client TLS handshakes when TLS with Client Certificates and Diffie-Hellman Ephemeral (DHE) key exchange are in use. This medium-severity vulnerability (CVSS 5.9) has a network attack vector and high attack complexity, potentially leading to high confidentiality impact without affecting integrity or availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
10.5CPE matchmatch criteria
cpe:2.3:o:citrix:application_delivery_controller_firmware:10.5:*:*:*:*:*:*:*
11.0CPE matchmatch criteria
cpe:2.3:o:citrix:application_delivery_controller_firmware:11.0:*:*:*:*:*:*:*
11.1CPE matchmatch criteria
cpe:2.3:o:citrix:application_delivery_controller_firmware:11.1:*:*:*:*:*:*:*
12.0CPE matchmatch criteria
cpe:2.3:o:citrix:application_delivery_controller_firmware:12.0:*:*:*:*:*:*:*
10.5CPE matchmatch criteria
cpe:2.3:o:citrix:netscaler_gateway_firmware:10.5:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.9MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.57%
Probability of exploitation in next 30 days
EPSS Percentile
72.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0157 is in the 48th percentile among its peer group of 19,958 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 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/ctx230612
Vendor Advisory
securityfocus.com / bid/102177
Third Party AdvisoryVDB Entry
securitytracker.com / id/1040011
Third Party AdvisoryVDB Entry