Path traversal and remote code execution in Citrix ADC and Gateway

Published: 2020-01-14
Risk Critical
Patch available NO
Number of vulnerabilities 1
CVE-ID CVE-2019-19781
Exploitation vector Network
Public exploit Vulnerability #1 is being exploited in the wild.
Vulnerable software
Citrix NetScaler Application Delivery Controller
Server applications / Application servers

Vendor Citrix

Security Bulletin

This security bulletin contains one critical risk vulnerability.

1) Path traversal

EUVDB-ID: #VU24233

Risk: Critical

CVSSv3.1: 9.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:U/RC:C]

CVE-ID: CVE-2019-19781

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

Exploit availability: Yes


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 - 13.0

CPE2.3 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?

Yes. This vulnerability is being exploited in the wild.