CVE-2019-19781

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score elevated to 9.8 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 9.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Exploited in the wild
9.8EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 100%CVSS: 9.8Exploit: cisa kev · ssvc active · kev ransomware · Metasploit · epss top5pct · epss high · public exploitExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
9.8
EG Score
9.8(high)
EG Risk
99(Act)
EG Risk 99/100SSVC: Act

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation100% × 40%
Automatability100% × 15%
Action: Fix now — active exploitation, automatable, high impact.
EPSS PROB
100%
EPSS %ILE
100%
KEV
⚠ Exploited

Published

December 27, 2019

Last Modified

August 12, 2026

Advisory Details (8)

Auto-updated Sep 23, 2026
No patch confirmed yet. Sources: cert.
cert

VU#619785 - Citrix Application Delivery Controller, Citrix Gateway, and Citrix SD-WAN WANOP web server vulnerability

https://www.kb.cert.org/vuls/id/619785
generic

Loading...

https://support.citrix.com/article/CTX267027
generic

Banned | Packet Storm

http://packetstormsecurity.com/files/155972/Citrix-ADC-Gateway-Path-Traversal.html
generic

Banned | Packet Storm

http://packetstormsecurity.com/files/155947/Citrix-ADC-NetScaler-Directory-Traversal-Remote-Code-Execution.html
generic

Banned | Packet Storm

http://packetstormsecurity.com/files/155930/Citrix-Application-Delivery-Controller-Gateway-10.5-Remote-Code-Execution.html
generic

Banned | Packet Storm

http://packetstormsecurity.com/files/155905/Citrix-Application-Delivery-Controller-Gateway-Remote-Code-Execution-Traversal.html
generic

Banned | Packet Storm

http://packetstormsecurity.com/files/155904/Citrix-Application-Delivery-Controller-Gateway-Remote-Code-Execution.html
generic
https://twitter.com/bad_packets/status/1215431625766424576

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 47× in last 7d / 196× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 765 total refreshes for this CVE.

  1. 2026-09-25 14:55 UTCCISA KEV update
  2. 2026-09-25 14:47 UTCGHSA enrichment
  3. 2026-09-25 10:44 UTCGHSA enrichment
  4. 2026-09-25 06:29 UTCGHSA enrichment
  5. 2026-09-25 02:29 UTCGHSA enrichment
  6. 2026-09-24 22:28 UTCGHSA enrichment
  7. 2026-09-24 19:31 UTCCISA KEV update
  8. 2026-09-24 18:27 UTCGHSA enrichment
  9. 2026-09-24 14:27 UTCGHSA enrichment
  10. 2026-09-24 10:26 UTCGHSA enrichment
  11. 2026-09-24 06:25 UTCGHSA enrichment
  12. 2026-09-24 02:24 UTCGHSA enrichment
  13. 2026-09-23 22:24 UTCGHSA enrichment
  14. 2026-09-23 18:23 UTCGHSA enrichment
  15. 2026-09-23 14:21 UTCGHSA enrichment
  16. 2026-09-23 10:20 UTCGHSA enrichment
  17. 2026-09-23 06:19 UTCGHSA enrichment
  18. 2026-09-23 02:19 UTCGHSA enrichment
  19. 2026-09-22 22:18 UTCGHSA enrichment
  20. 2026-09-22 19:36 UTCCISA KEV update
  21. 2026-09-22 18:17 UTCGHSA enrichment
  22. 2026-09-22 14:16 UTCGHSA enrichment
  23. 2026-09-22 10:15 UTCGHSA enrichment
  24. 2026-09-22 06:14 UTCGHSA enrichment
  25. 2026-09-22 02:13 UTCGHSA enrichment
Show 75 more
  1. 2026-09-21 22:12 UTCGHSA enrichment
  2. 2026-09-21 19:09 UTCCISA KEV update
  3. 2026-09-21 18:11 UTCGHSA enrichment
  4. 2026-09-21 14:11 UTCGHSA enrichment
  5. 2026-09-21 10:10 UTCGHSA enrichment
  6. 2026-09-21 06:09 UTCGHSA enrichment
  7. 2026-09-21 02:08 UTCGHSA enrichment
  8. 2026-09-20 22:07 UTCGHSA enrichment
  9. 2026-09-20 18:05 UTCGHSA enrichment
  10. 2026-09-20 14:05 UTCGHSA enrichment
  11. 2026-09-20 10:04 UTCGHSA enrichment
  12. 2026-09-20 06:04 UTCGHSA enrichment
  13. 2026-09-20 02:03 UTCGHSA enrichment
  14. 2026-09-19 22:02 UTCGHSA enrichment
  15. 2026-09-19 18:00 UTCGHSA enrichment
  16. 2026-09-19 13:58 UTCGHSA enrichment
  17. 2026-09-19 09:56 UTCGHSA enrichment
  18. 2026-09-19 05:55 UTCGHSA enrichment
  19. 2026-09-19 01:54 UTCGHSA enrichment
  20. 2026-09-18 21:54 UTCGHSA enrichment
  21. 2026-09-18 19:20 UTCCISA KEV update
  22. 2026-09-18 17:54 UTCGHSA enrichment
  23. 2026-09-18 14:15 UTCCISA KEV update
  24. 2026-09-18 13:53 UTCGHSA enrichment
  25. 2026-09-18 09:52 UTCGHSA enrichment
  26. 2026-09-18 05:51 UTCGHSA enrichment
  27. 2026-09-18 01:51 UTCGHSA enrichment
  28. 2026-09-17 21:50 UTCGHSA enrichment
  29. 2026-09-17 17:49 UTCGHSA enrichment
  30. 2026-09-17 13:48 UTCGHSA enrichment
  31. 2026-09-17 09:47 UTCGHSA enrichment
  32. 2026-09-17 05:46 UTCGHSA enrichment
  33. 2026-09-17 01:45 UTCGHSA enrichment
  34. 2026-09-16 21:44 UTCGHSA enrichment
  35. 2026-09-16 17:43 UTCGHSA enrichment
  36. 2026-09-16 14:10 UTCCISA KEV update
  37. 2026-09-16 13:42 UTCGHSA enrichment
  38. 2026-09-16 09:40 UTCGHSA enrichment
  39. 2026-09-16 05:39 UTCGHSA enrichment
  40. 2026-09-16 01:39 UTCGHSA enrichment
  41. 2026-09-15 21:38 UTCGHSA enrichment
  42. 2026-09-15 17:37 UTCGHSA enrichment
  43. 2026-09-15 13:36 UTCGHSA enrichment
  44. 2026-09-15 09:35 UTCGHSA enrichment
  45. 2026-09-15 05:34 UTCGHSA enrichment
  46. 2026-09-15 01:33 UTCGHSA enrichment
  47. 2026-09-14 21:33 UTCGHSA enrichment
  48. 2026-09-14 19:24 UTCCISA KEV update
  49. 2026-09-14 17:32 UTCGHSA enrichment
  50. 2026-09-14 13:31 UTCGHSA enrichment
  51. 2026-09-14 09:31 UTCGHSA enrichment
  52. 2026-09-14 05:30 UTCGHSA enrichment
  53. 2026-09-14 01:30 UTCGHSA enrichment
  54. 2026-09-13 21:29 UTCGHSA enrichment
  55. 2026-09-13 17:28 UTCGHSA enrichment
  56. 2026-09-13 13:27 UTCGHSA enrichment
  57. 2026-09-13 09:26 UTCGHSA enrichment
  58. 2026-09-13 05:26 UTCGHSA enrichment
  59. 2026-09-13 01:26 UTCGHSA enrichment
  60. 2026-09-12 21:25 UTCGHSA enrichment
  61. 2026-09-12 17:24 UTCGHSA enrichment
  62. 2026-09-12 13:24 UTCGHSA enrichment
  63. 2026-09-12 09:22 UTCGHSA enrichment
  64. 2026-09-12 05:21 UTCGHSA enrichment
  65. 2026-09-12 01:20 UTCGHSA enrichment
  66. 2026-09-11 21:19 UTCGHSA enrichment
  67. 2026-09-11 18:49 UTCCISA KEV update
  68. 2026-09-11 17:19 UTCGHSA enrichment
  69. 2026-09-11 13:18 UTCGHSA enrichment
  70. 2026-09-11 09:17 UTCGHSA enrichment
  71. 2026-09-11 05:16 UTCGHSA enrichment
  72. 2026-09-11 01:15 UTCGHSA enrichment
  73. 2026-09-10 21:14 UTCGHSA enrichment
  74. 2026-09-10 19:28 UTCCISA KEV update
  75. 2026-09-10 17:13 UTCGHSA enrichment

Publicly available exploits

(10 references)

Working exploit code is in the public domain (7 GitHub PoCs) (3 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCw4fz5uck5/CVE-2019-19781-CitrixRCE
    First seen Jul 17, 2020

    Citrix Unauthorized Remote Code Execution Attacker - CVE-2019-19781

    Open source ↗
  • GitHub PoCmandiant/ioc-scanner-CVE-2019-19781
    First seen Jan 21, 2020

    Indicator of Compromise Scanner for CVE-2019-19781

    Open source ↗
  • GitHub PoCcitrix/ioc-scanner-CVE-2019-19781
    First seen Jan 21, 2020

    Indicator of Compromise Scanner for CVE-2019-19781

    Open source ↗
  • Exploit-DBEDB-47930
    First seen Jan 16, 2020

    Citrix Application Delivery Controller (ADC) and Gateway 13.0 - Path Traversal

    Open source ↗
  • Exploit-DBEDB-47913
    First seen Jan 13, 2020

    Citrix Application Delivery Controller and Gateway 10.5 - Remote Code Execution (Metasploit)

    Open source ↗
  • GitHub PoCMalwareTech/CitrixHoneypot
    First seen Jan 13, 2020

    Detect and log CVE-2019-19781 scan and exploitation attempts.

    Open source ↗
  • GitHub PoCaqhmal/CVE-2019-19781
    First seen Jan 13, 2020

    Automated script for Citrix ADC scanner (CVE-2019-19781) using hosts retrieved from Shodan API. You must have a Shodan account to use this script.

    Open source ↗
  • Exploit-DBEDB-47901
    First seen Jan 11, 2020

    Citrix Application Delivery Controller and Citrix Gateway - Remote Code Execution (PoC)

    Open source ↗
  • GitHub PoCtrustedsec/cve-2019-19781
    First seen Jan 11, 2020

    This is a tool published for the Citrix ADC (NetScaler) vulnerability. We are only disclosing this due to others publishing the exploit code first.

    Open source ↗
  • GitHub PoCmpgn/CVE-2019-19781
    First seen Jan 11, 2020

    CVE-2019-19781 - Remote Code Execution on Citrix ADC Netscaler exploit

    Open source ↗

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2019-19781?
CVE-2019-19781 is a critical vulnerability published on December 27, 2019. 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.
When was CVE-2019-19781 disclosed?
CVE-2019-19781 was first published in the National Vulnerability Database on December 27, 2019, with the most recent update on August 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2019-19781 actively exploited?
Yes. CISA added CVE-2019-19781 to the Known Exploited Vulnerabilities catalog on November 3, 2021, affecting Citrix Application Delivery Controller (ADC), Gateway, and SD-WAN WANOP Appliance. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2019-19781?
CVE-2019-19781 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2019-19781?
CVE-2019-19781 affects Citrix Application Delivery Controller (ADC), Gateway, and SD-WAN WANOP Appliance. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2019-19781?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-19781, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2019-19781

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