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…
- 9.8CriticalCVSS base score
- 100.0%Exploitation in 30 daysEPSS · top 0.1% of all CVEs
- YesKnown exploitedin CISA's KEV since 3 Nov 2021
- 6Public exploitsMetasploit, Nuclei and Exploit-DB
Description
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.
Exploited in the wild
CISA lists this vulnerability in its Known Exploited Vulnerabilities catalog as Citrix ADC, Gateway, and SD-WAN WANOP Appliance Code Execution Vulnerability.
- Added
- 3 Nov 2021
- Fix due (US federal)
- 3 May 2022
- Used by ransomware
- Known
Apply updates per vendor instructions.
ENISA's EU Vulnerability Database lists it as exploited, from CISA's KEV, since 3 Nov 2021.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. The public collections list 2 Metasploit modules, a Nuclei template and 3 Exploit-DB entries for it. CISA's SSVC rates its exploitation: it is being exploited.
Show the exploits6
Metasploit modules2 modules
- Citrix ADC (NetScaler) Directory Traversal Scanner (Metasploit module) (opens in a new tab)
auxiliary/scanner/http/citrix_dir_traversalRank normaldisclosed 17 Dec 2019
- Citrix ADC (NetScaler) Directory Traversal RCE (Metasploit module) (opens in a new tab)
exploit/freebsd/http/citrix_dir_traversal_rceRank excellentdisclosed 17 Dec 2019
Nuclei templates1 template
- Citrix ADC and Gateway - Directory Traversal (Nuclei template) (opens in a new tab)
http/cves/2019/CVE-2019-19781.yamlSeverity critical
Exploit-DB3 entries
- Citrix Application Delivery Controller (ADC) and Gateway 13.0 - Path Traversal (Exploit-DB entry) (opens in a new tab)
EDB-ID 47930webapps, multiplepublished 16 Jan 2020Not verified
- Citrix Application Delivery Controller and Gateway 10.5 - Remote Code Execution (Metasploit) (Exploit-DB entry) (opens in a new tab)
EDB-ID 47913webapps, multiplepublished 13 Jan 2020Not verified
- Citrix Application Delivery Controller and Citrix Gateway - Remote Code Execution (PoC) (Exploit-DB entry) (opens in a new tab)
EDB-ID 47901webapps, multiplepublished 11 Jan 2020Not verified
Modules, templates and exploits as listed by the Metasploit Framework (BSD-3-Clause), ProjectDiscovery's Nuclei templates (MIT) and the Exploit Database (GPLv2), read once a day. Where the data comes from
Timeline
ID reserved
By mitre
- 14 days later
· 14 days later
Published
- 23 months later
· 23 months later
Added to CISA KEV
Known exploited, also by ransomware
- 5 years later
· 5 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Analyzed | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 100.0% · top 0.1% of all CVEs (11 Nov 2026)
- CISA SSVC
- Exploitation: active · Automatable: yes · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Affected products
n/a
- affected n/a
References
11
- https://support.citrix.com/article/CTX267027 (opens in a new tab)x_refsource_CONFIRMx_transferred
- VU#619785 (opens in a new tab)third-party-advisoryx_refsource_CERT-VNx_transferred
- https://twitter.com/bad_packets/status/1215431625766424576 (opens in a new tab)x_refsource_MISCx_transferred
- https://badpackets.net/over-25000-citrix-netscaler-endpoints-vulnerable-to-cve-2019-19781/ (opens in a new tab)x_refsource_MISCx_transferred
- https://forms.gle/eDf3DXZAv96oosfj6 (opens in a new tab)x_refsource_MISCx_transferred
- http://packetstormsecurity.com/files/155904/Citrix-Application-Delivery-Controller-Gateway-Remote-Code-Execution.html (opens in a new tab)x_refsource_MISCx_transferred
- http://packetstormsecurity.com/files/155930/Citrix-Application-Delivery-Controller-Gateway-10.5-Remote-Code-Execution.html (opens in a new tab)x_refsource_MISCx_transferred
- http://packetstormsecurity.com/files/155905/Citrix-Application-Delivery-Controller-Gateway-Remote-Code-Execution-Traversal.html (opens in a new tab)x_refsource_MISCx_transferred
- http://packetstormsecurity.com/files/155947/Citrix-ADC-NetScaler-Directory-Traversal-Remote-Code-Execution.html (opens in a new tab)x_refsource_MISCx_transferred
- http://packetstormsecurity.com/files/155972/Citrix-ADC-Gateway-Path-Traversal.html (opens in a new tab)x_refsource_MISCx_transferred
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-19781 (opens in a new tab)government-resource
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- CISA KEV catalog (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2019-9380 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2019-19781)Record last updated .