CVE-2019-19781: Citrix ADC, Gateway, and SD-WAN WANOP Appliance Code Execution Vulnerability

CVSS: 9.8v3.1CriticalKEVRansomwareAnalyzed

Published 27-12-2019Last modified 12-08-2026

Vulnerability summary

CVE-2019-19781 is a critical (CVSS 9.8) Path Traversal vulnerability in Citrix Application Delivery Controller (ADC), Gateway, and SD-WAN WANOP Appliance. It is known to be exploited: CISA lists it, first on 03-11-2021. It has been used in ransomware campaigns. EPSS estimates a 100.00% chance of exploitation in the next 30 days, higher than 99.9% of scored vulnerabilities. 5 public exploits are recorded.

Overall risk

90/100

0100

Critical · default modelHow is this calculated?

CVSS score

9.8/10

010

Critical · v3.1 (CVE.org)

EPSS score

100.00%

0%100%

Critical · 0.00 pp in 30 days

KEVListedCISA

RansomwareKnown useFlagged by CISA

Public exploits5exploit-database, metasploit

Timeline

27-12-2019
PublishedVulnerability first disclosed.
03-11-2021
Added to CISA KEVCitrix ADC, Gateway, and SD-WAN WANOP Appliance Code Execution Vulnerability
03-05-2022
CISA remediation dueApply updates per vendor instructions.
12-08-2026
Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 2 sources · 2 versions

v3.19.8v2.07.5

EPSS trend

Probability

100.00%

Chance of exploitation in the next 30 days

Percentile

100%

Versus all other CVEs

30-day change

0.00 pp

From 100.00% on 18-09-2026

18-09-202618-10-2026

EPSS score

100.00%

Known exploited

Compare KEV catalogs

CISA KEVListed

Added: 03-11-2021
Federal due date: 03-05-2022

CISA required action

Apply updates per vendor instructions. nvd.nist.gov/vuln/detail/CVE-2019-19781

Public exploits

5 found

exploit-databasemultipleUnverified
Citrix Application Delivery Controller (ADC) and Gateway 13.0 - Path Traversal
Maturity: poc
exploit-databasemultipleUnverified
Citrix Application Delivery Controller and Citrix Gateway - Remote Code Execution (PoC)
Maturity: poc
exploit-databasemultipleUnverified
Citrix Application Delivery Controller and Gateway 10.5 - Remote Code Execution (Metasploit)
Maturity: poc

Show all 5 exploits

MetasploitremoteUnverified
Citrix ADC (NetScaler) Directory Traversal Scanner
auxiliary/scanner/http/citrix_dir_traversal
Maturity: poc
MetasploitremoteVerified
Citrix ADC (NetScaler) Directory Traversal RCE
exploit/freebsd/http/citrix_dir_traversal_rce
Maturity: weaponized

Weaknesses

CWE · root cause

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

Affected systems

Citrix3 products

application_delivery_controller10.5 | 11.1 | 12.0 | 12.1 | 13.0
gateway13.0
netscaler_gateway10.5 | 11.1 | 12.0 | 12.1

1 vendor · 3 products

References

11 links

support.citrix.com/article/CTX267027X Refsource CONFIRMVendor Advisory
www.kb.cert.org/vuls/id/619785Third Party AdvisoryX Refsource CERT VNUS Government Resource
twitter.com/bad_packets/status/1215431625766424576X Refsource MISCBroken LinkThird Party Advisory
badpackets.net/over-25000-citrix-netscaler-endpoints-vulnerable-to-cve-2019-19781/X Refsource MISCBroken LinkThird Party Advisory
forms.gle/eDf3DXZAv96oosfj6X Refsource MISCThird Party Advisory
packetstormsecurity.com/files/…X Refsource MISCThird Party AdvisoryVDB Entry
packetstormsecurity.com/files/…X Refsource MISCThird Party AdvisoryVDB Entry
packetstormsecurity.com/files/…X Refsource MISCThird Party AdvisoryVDB Entry
packetstormsecurity.com/files/…X Refsource MISCThird Party AdvisoryVDB Entry
packetstormsecurity.com/files/155972/Citrix-ADC-Gateway-Path-Traversal.htmlX Refsource MISCThird Party AdvisoryVDB Entry

Show all 11 references

www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-19781Government ResourceUS Government Resource

Vulnerability summary

Timeline

Description

CVSS metrics

EPSS trend

Known exploited

Public exploits

Weaknesses

Affected systems

References

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