Vulnerability Monitor

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CVE-2019-19781

An issue was discovered in Citrix Application Delivery Controller (ADC) and Gateway 10.5, 11.1, 12.0, 12.1, and 13.0. They allow Directory Traversal.

Security Impact Summary

This vulnerability carries a CRITICAL severity rating with a CVSS v3.1 score of 9.8, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 6 products from citrix, from citrix, from citrix and 3 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2019, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2019-12-27T14:15:12.070

Last Modified

2025-11-07T19:37:02.870

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.1: 9.8 (CRITICAL)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:P/I:P/A:P

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

6.4

Weaknesses

Type: Primary
CWE-22
Type: Secondary
CWE-22

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	citrix	application_delivery_controller_firmware	10.5	Yes
Operating System	citrix	application_delivery_controller_firmware	11.1	Yes
Operating System	citrix	application_delivery_controller_firmware	12.0	Yes
Operating System	citrix	application_delivery_controller_firmware	12.1	Yes
Operating System	citrix	application_delivery_controller_firmware	13.0	Yes
Hardware	citrix	application_delivery_controller	-	No
Operating System	citrix	netscaler_gateway_firmware	10.5	Yes
Operating System	citrix	netscaler_gateway_firmware	11.1	Yes
Operating System	citrix	netscaler_gateway_firmware	12.0	Yes
Operating System	citrix	netscaler_gateway_firmware	12.1	Yes
Hardware	citrix	netscaler_gateway	-	No
Operating System	citrix	gateway_firmware	13.0	Yes
Hardware	citrix	gateway	-	No

References

http://packetstormsecurity.com/files/155904/Citrix-Application-Delivery-Controller-Gateway-Remote-Code-Execution.html Third Party Advisory, VDB Entry ([email protected])
http://packetstormsecurity.com/files/155905/Citrix-Application-Delivery-Controller-Gateway-Remote-Code-Execution-Traversal.html Third Party Advisory, VDB Entry ([email protected])
http://packetstormsecurity.com/files/155930/Citrix-Application-Delivery-Controller-Gateway-10.5-Remote-Code-Execution.html Third Party Advisory, VDB Entry ([email protected])
http://packetstormsecurity.com/files/155947/Citrix-ADC-NetScaler-Directory-Traversal-Remote-Code-Execution.html Third Party Advisory, VDB Entry ([email protected])
http://packetstormsecurity.com/files/155972/Citrix-ADC-Gateway-Path-Traversal.html Third Party Advisory, VDB Entry ([email protected])
https://badpackets.net/over-25000-citrix-netscaler-endpoints-vulnerable-to-cve-2019-19781/ Broken Link, Third Party Advisory ([email protected])
https://forms.gle/eDf3DXZAv96oosfj6 Third Party Advisory ([email protected])
https://support.citrix.com/article/CTX267027 Vendor Advisory ([email protected])
https://twitter.com/bad_packets/status/1215431625766424576 Broken Link, Third Party Advisory ([email protected])
https://www.kb.cert.org/vuls/id/619785 Third Party Advisory, US Government Resource ([email protected])
http://packetstormsecurity.com/files/155904/Citrix-Application-Delivery-Controller-Gateway-Remote-Code-Execution.html Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://packetstormsecurity.com/files/155905/Citrix-Application-Delivery-Controller-Gateway-Remote-Code-Execution-Traversal.html Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://packetstormsecurity.com/files/155930/Citrix-Application-Delivery-Controller-Gateway-10.5-Remote-Code-Execution.html Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://packetstormsecurity.com/files/155947/Citrix-ADC-NetScaler-Directory-Traversal-Remote-Code-Execution.html Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://packetstormsecurity.com/files/155972/Citrix-ADC-Gateway-Path-Traversal.html Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://badpackets.net/over-25000-citrix-netscaler-endpoints-vulnerable-to-cve-2019-19781/ Broken Link, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://forms.gle/eDf3DXZAv96oosfj6 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://support.citrix.com/article/CTX267027 Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://twitter.com/bad_packets/status/1215431625766424576 Broken Link, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.kb.cert.org/vuls/id/619785 Third Party Advisory, US Government Resource (af854a3a-2127-422b-91ae-364da2661108)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-19781 US Government Resource (134c704f-9b21-4f2e-91b3-4a467353bcc0)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For citrix's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.