CVE-2019-19781An issue was discovered in Citrix Application Delivery Controller (ADC) and Gateway 10.5, 11.1, 12.0, 12.1, and 13.0.
Updated under an hour ago ()
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It affects citrix application_delivery_controller_firmware and 2 other products. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Nov 3, 2021; federal agencies had to remediate by May 3, 2022, and it is known to be used in ransomware. Treat that date as your deadline.
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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.
- CVSS
- 9.8 CRITICAL (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-22
- Known exploited
- Added to CISA KEV Nov 3, 2021; federal remediation due May 3, 2022; known ransomware useApply updates per vendor instructions.
- EPSS (exploitation in the next 30 days)
- 100.00% (percentile 100)
- Assigned by
- mitre
- NVD analysis
- Analyzed
- Record last updated
- Aug 12, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
citrix application_delivery_controller_firmware citrix:application_delivery_controller_firmware | 10.5; 11.1; 12.0; 12.1; 13.0 | NVD |
citrix netscaler_gateway_firmware citrix:netscaler_gateway_firmware | 10.5; 11.1; 12.0; 12.1 | NVD |
citrix gateway_firmware citrix:gateway_firmware | 13.0 | NVD |
References
- https://support.citrix.com/article/CTX267027x-refsource-confirm, vendor-advisory
- https://www.kb.cert.org/vuls/id/619785third-party-advisory, x-refsource-cert-vn, us-government-resource
- https://twitter.com/bad_packets/status/1215431625766424576x-refsource-misc, broken-link, third-party-advisory
- https://badpackets.net/over-25000-citrix-netscaler-endpoints-vulnerable-to-cve-2019-19781/x-refsource-misc, broken-link, third-party-advisory
- https://forms.gle/eDf3DXZAv96oosfj6x-refsource-misc, third-party-advisory
- http://packetstormsecurity.com/files/155904/Citrix-Application-Delivery-Controller-Gateway-Remote-Code-Execution.htmlx-refsource-misc, third-party-advisory, vdb-entry
- http://packetstormsecurity.com/files/155930/Citrix-Application-Delivery-Controller-Gateway-10.5-Remote-Code-Execution.htmlx-refsource-misc, third-party-advisory, vdb-entry
- http://packetstormsecurity.com/files/155905/Citrix-Application-Delivery-Controller-Gateway-Remote-Code-Execution-Traversal.htmlx-refsource-misc, third-party-advisory, vdb-entry
- http://packetstormsecurity.com/files/155947/Citrix-ADC-NetScaler-Directory-Traversal-Remote-Code-Execution.htmlx-refsource-misc, third-party-advisory, vdb-entry
- http://packetstormsecurity.com/files/155972/Citrix-ADC-Gateway-Path-Traversal.htmlx-refsource-misc, third-party-advisory, vdb-entry
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-19781us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.