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Vulnerability record · CVE-2018-6809 · published 6 March 2018

CVE-2018-6809: Citrix netscaler application delivery controller firmware vulnerability

Citrix · Netscaler Application Delivery Controller Firmware

NetScaler ADC 10.5, 11.0, 11.1, and 12.0, and NetScaler Gateway 10.5, 11.0, 11.1, and 12.0 allow remote attackers to gain privilege on a target system.

9.8 CVSS 3.0 Critical EPSS 4.1% · top 9.5%
9.8CVSS 3.0 base score, v2 10.0
4.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

NetScaler ADC 10.5, 11.0, 11.1, and 12.0, and NetScaler Gateway 10.5, 11.0, 11.1, and 12.0 allow remote attackers to gain privilege on a target system.

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

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securitytracker.com/id/1040440 Third Party AdvisoryVDB Entry
https://support.citrix.com/article/CTX232161 Vendor Advisory
http://www.securitytracker.com/id/1040440 Third Party AdvisoryVDB Entry
https://support.citrix.com/article/CTX232161 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2019-19781Citrix ADC and Gateway directory traversal enabling code executionCitrix Application Delivery Controller (ADC) and Gateway versions 10.5, 11.1, 12.0, 12.1, and 13.0 contain a directory traversal flaw (CWE-22). The t…KEVEPSS 100%analysed6.5CVE-2020-8193Citrix ADC and Gateway improper access control allows unauthenticated endpoint accessCitrix ADC, Citrix Gateway, and Citrix SD-WAN WAN-OP contain an improper access control flaw (CWE-284/CWE-287) that lets unauthenticated users reach …KEVEPSS 88%analysed6.5CVE-2020-8195Citrix ADC and Gateway improper input validation information disclosureCitrix ADC, Citrix Gateway, and Citrix SD-WAN WAN-OP contain improper input validation that can result in limited information disclosure to low privi…KEVEPSS 33%analysed4.3CVE-2020-8196Citrix ADC and Gateway improper access control information disclosureCitrix ADC, Citrix Gateway and Citrix SD-WAN WAN-OP appliances contain an improper access control flaw (CWE-284/CWE-287) that allows limited informat…KEVEPSS 26%analysed10.0CVE-2015-5538Citrix netscaler application delivery controller firmware vulnerabilityMultiple unspecified vulnerabilities in Citrix NetScaler Application Delivery Controller (ADC) and NetScaler Gateway before 10.1 Build 132.8, 10.5 be…EPSS 3.2%10.0CVE-2014-2881Citrix netscaler access gateway firmware vulnerabilityUnspecified vulnerability in the Diffie-Hellman key agreement implementation in the management GUI Java applet in Citrix NetScaler Application Delive…EPSS 1.9%10.0CVE-2014-2882Citrix netscaler access gateway firmware vulnerabilityUnspecified vulnerability in the management GUI in Citrix NetScaler Application Delivery Controller (ADC) and NetScaler Gateway before 9.3-66.5 and 1…EPSS 1.1%10.0CVE-2013-6941Citrix netscaler application delivery controller firmware vulnerabilityUnspecified vulnerability in Citrix NetScaler Application Delivery Controller (ADC) 9.3.x before 9.3-64.4, 10.0 before 10.0-77.5, and 10.1 before 10.…EPSS 1.7%

Source: NIST National Vulnerability Database (record CVE-2018-6809), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.