critical Known exploitedREV. 01
CVE-2019-19781Citrix ADC & Gateway — Directory Traversal to Code Execution
Citrix Application Delivery Controller and Gateway appliances let a request walk out of its directory on the web interface, which unauthenticated attackers turned into code execution on the box that fronts the corporate network.
Read the risk
THE VITAL STATS- CVSS score
- 9.8/ 10 CVSS v3.1
- EPSS probability
- 100% Likelihood of exploitation
- Attack complexity
- Low Conditions needed to exploit
- Known exploited
- Yes — CISA KEV
- CVE published
- 2019-12-27
- Added to KEV
- 2021-11-03
- Exploit published
- Yes
- Confidence
- medium
- Kill chain
- initial access
- MITRE ATT&CK
- T1190
- Severity
- critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attacker needsNetwork access to the web interface of an affected appliance (10.5, 11.1, 12.0, 12.1, 13.0). No credentials needed.
Behind the card
4 REFERENCES- 01CVE recordNVD recordnvd.nist.gov
- 02Vendor advisoryCitrix article CTX267027support.citrix.com
- 03ReferenceCERT Coordination Center note VU#619785kb.cert.org
- 04CISACISA Known Exploited Vulnerabilities entrycisa.gov
Field-level provenanceTRACE THE SOURCES +
Which source supports each field, when it was retrieved, and who extracted it.
| Fields | Source | Retrieved | Extractor | Confidence |
|---|---|---|---|---|
| title, summary, cvss, severity, exploitation.attack_complexity, exploitation.prerequisites, exploitation.exploit_available, references | nvd.nist.gov | 2026-08-07 | claude-code | medium |
| exploitation.known_exploited, remediation.patch_available, recommended_action | cisa.gov | 2026-08-07 | claude-code | high |
| epss | api.first.org | 2026-08-07 | claude-code | high |
Printing history
THE RECORD- r1Initial base card
First printing. This card has not been reprinted since publication.