Which products and versions are affected by CVE-2017-6316?

Affected: Netscaler SD-WAN (Citrix). The full list is in the CVE brief.

Is CVE-2017-6316 being exploited in the wild?

It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Dec 13, 2019.

Is CVE-2017-6316 in the CISA KEV catalog?

Yes. It was added on Mar 25, 2022 with a federal remediation due date of Apr 15, 2022.

Is there a public exploit for CVE-2017-6316?

Public exploit code is available.

Is there a fix for CVE-2017-6316?

Fixed versions are available, including Netscaler SD-WAN 9.1.2.26.561201.

How urgently should CVE-2017-6316 be patched?

Brandefense priority: patch immediately, because it is listed as exploited in the wild.

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Vulnerability Intelligence

CVE-2017-6316

CriticalExploitedPublic exploit

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.

Published Jul 20, 2017 · Updated Apr 21, 2026

Key Facts

Patch immediately

CVE-2017-6316 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Netscaler SD-WAN (Citrix).
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Dec 13, 2019. Public exploit code is available.
EPSS estimates a 73% probability of exploitation in the next 30 days.
Fixed versions are available, including Netscaler SD-WAN 9.1.2.26.561201.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

CVSS v3.1

9.8

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

EPSS (30-day exploit likelihood)

73%

Higher than 99.4% of all scored CVEs

Exploited in the wild

Yes

4 catalog listings

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2017-6316 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

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.

Known-Exploited Catalog Listings

Catalog	Added	Remediation due	Ransomware use
CISA KEV	Mar 25, 2022	Apr 15, 2022	Not reported
Industry KEV feed	Dec 13, 2019	Apr 15, 2022	Not reported
CIRCL KEV	Mar 25, 2022	Apr 15, 2022	Not reported
ENISA EUVD	Mar 25, 2022	n/a	Not reported

Required action: Apply updates per vendor instructions.

Affected Products

1 affected entries in total

Product	Affected versions	Fixed in
Netscaler SD-WANCitrix	See advisory	9.1.2.26.561201

Patched Releases

Netscaler SD-WAN

9.1.2.26.561201

Timeline

Publicly disclosed
Jul 20, 2017
Added to Industry KEV feed
Dec 13, 2019
Added to CISA KEV
Mar 25, 2022
Added to CIRCL KEV
Mar 25, 2022
Added to ENISA EUVD
Mar 25, 2022
Last updated
Apr 21, 2026

References

8 more references in the full CVE brief

FAQ

Common Questions.

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.
Affected: Netscaler SD-WAN (Citrix). The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Dec 13, 2019.
Yes. It was added on Mar 25, 2022 with a federal remediation due date of Apr 15, 2022.
Public exploit code is available.
Fixed versions are available, including Netscaler SD-WAN 9.1.2.26.561201.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

Is CVE-2017-6316 Running On Your Attack Surface?

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