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Path traversal and remote code execution in Citrix ADC and Gateway

Published: 2020-01-14
Severity Critical
Patch available NO
Number of vulnerabilities 1
CVE ID CVE-2019-19781
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
Citrix NetScaler Application Delivery Controller
Server applications / Application servers

Vendor Citrix

Security Advisory

This security advisory describes one critical risk vulnerability.

1) Path traversal

Severity: Critical

CVSSv3: 9.6 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:U/RC:C] [PCI]

CVE-ID: CVE-2019-19781

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Exploit availability: Yes [Search exploit]


The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences in Citrix NetScaler. A remote attacker can send a specially crafted HTTP request and read arbitrary files or execute commands on the system.

Successful exploitation of the vulnerability may allow remote code execution.


Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Citrix NetScaler Application Delivery Controller: 10.5, 10.5e, 11.0, 11.1, 12.0, 12.1, 13.0

CPE External links

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, a fully functional exploit for this vulnerability is available.