CVE-2017-6316

Name: CVE-2017-6316
Creator: NVD / NIST
Published: 2017-07-20T04:29:00.423+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10Actively ExploitedEPSS 72.60%

Last modified Jun 17, 2026

CVE-2017-6316 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Citrix NetScaler SD-WAN devices through v9.1.2.26.561201 allow remote attackers to execute arbitrary shell commands as root via a CGISESSID cookie. On CloudBridge (the former name of NetScaler SD-WAN) devices, the cookie name was CAKEPHP rather than CGISESSID.. CISA has confirmed active exploitation in the wild. EPSS estimates a 72.60% chance of exploitation in the next 30 days.

Description

Citrix NetScaler SD-WAN devices through v9.1.2.26.561201 allow remote attackers to execute arbitrary shell commands as root via a CGISESSID cookie. On CloudBridge (the former name of NetScaler SD-WAN) devices, the cookie name was CAKEPHP rather than CGISESSID.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

72.60%

99.4th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Apr 15, 2022.

Affected Software

Vendor	Product	Versions
Citrix	Netscaler Sd-Wan	<= 9.1.2.26.561201

References

http://www.securityfocus.com/bid/99943Broken Link, Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1039019Broken Link, Third Party Advisory, VDB Entry
https://support.citrix.com/article/CTX225990Permissions Required
https://www.exploit-db.com/exploits/42345/Exploit, Third Party Advisory, VDB Entry
https://www.exploit-db.com/exploits/42346/Third Party Advisory, VDB Entry
http://www.securityfocus.com/bid/99943Broken Link, Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1039019Broken Link, Third Party Advisory, VDB Entry
https://support.citrix.com/article/CTX225990Permissions Required
https://www.exploit-db.com/exploits/42345/Exploit, Third Party Advisory, VDB Entry
https://www.exploit-db.com/exploits/42346/Third Party Advisory, VDB Entry
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-6316US Government Resource

Timeline

Published: Jul 20, 2017
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2017-6316?

How severe is CVE-2017-6316?

CVE-2017-6316 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 72.60% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2017-6316?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-6316?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST