CVE-2023-3519

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 2023-07-19), 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
Trending — 4 sources updated this weekExploited in the wild
9.8EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • 1,979 internet-exposed hosts are running an affected version right now
  • Actively exploited in the wild (CISA-KEV)
  • Linked to ransomware campaigns
CISA-KEV: ExploitedEPSS PROB: 100%CVSS: 9.8Exploit: cisa kev · ssvc active · kev ransomware · Metasploit · epss top5pct · epss high · public exploitExposed: 1,979

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

Unauthenticated remote code execution

Live · internet exposure

1,979 internet-exposed hosts are running an affected version of CVE-2023-3519 right now.

across 20 countries (Australia, Indonesia, Norway, Germany, Lithuania)top: netscaler_gateway🔒 ransomware-linked
See the live KEV-Exposure radar →Found passively from public internet-scan data — aggregate, host-redacted.

EchelonGraph is the only CVE feed that fuses live vulnerability intelligence with its own live internet-exposure radar — so you see not just that a CVE is exploited, but how much of the internet is exposed to it right now.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
84(Attend)
EG Risk 84/100SSVC: Attend

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%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
100%
EPSS %ILE
100%
KEV
⚠ Exploited

Published

July 19, 2023

Last Modified

August 5, 2026

Advisory Details (3)

Auto-updated Aug 26, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-3519
generic

Loading...

https://support.citrix.com/article/CTX561482/citrix-adc-and-citrix-gateway-security-bulletin-for-cve20233519-cve20233466-cve20233467
generic

Packet Storm Security

http://packetstormsecurity.com/files/173997/Citrix-ADC-NetScaler-Remote-Code-Execution.html

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 51× in last 7d / 217× 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 665 total refreshes for this CVE.

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

Publicly available exploits

(10 references)

Working exploit code is in the public domain (1 Metasploit module) (8 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCdhammerg/CVE-2023-3519
    First seen Oct 27, 2023

    Stack-Overflow on Citrix

    Open source ↗
  • GitHub PoCChocapikk/CVE-2023-3519
    First seen Aug 24, 2023

    Citrix ADC RCE CVE-2023-3519

    Open source ↗
  • GitHub PoCmandiant/citrix-ioc-scanner-cve-2023-3519
    First seen Aug 10, 2023
    Open source ↗
  • GitHub PoCmr-r3b00t/CVE-2023-3519
    First seen Jul 21, 2023
    Open source ↗
  • GitHub PoCSalehLardhi/CVE-2023-3519
    First seen Jul 21, 2023

    CVE-2023-3519 vuln for nuclei scanner

    Open source ↗
  • GitHub PoCBishopFox/CVE-2023-3519
    First seen Jul 21, 2023

    RCE exploit for CVE-2023-3519

    Open source ↗
  • GitHub PoCtelekom-security/cve-2023-3519-citrix-scanner
    First seen Jul 20, 2023

    Citrix Scanner for CVE-2023-3519

    Open source ↗
  • GitHub PoCsecurekomodo/citrixInspector
    First seen Jul 20, 2023

    Accurately fingerprint and detect vulnerable (and patched!) versions of Netscaler / Citrix ADC to CVE-2023-3519

    Open source ↗
  • Metasploitexploit/freebsd/http/citrix_formssso_target_rce✓ verified
    First seen Jul 18, 2023

    Citrix ADC (NetScaler) Forms SSO Target RCE

    Open source ↗
  • Nucleihttp/cves/2023/CVE-2023-3519.yaml
    First seen Jan 1, 2023

    Citrix NetScaler ADC and NetScaler Gateway - Remote Code Execution

    Open source ↗

Frequently asked(6)

What is CVE-2023-3519?
CVE-2023-3519 is a critical vulnerability published on July 19, 2023. Unauthenticated remote code execution
When was CVE-2023-3519 disclosed?
CVE-2023-3519 was first published in the National Vulnerability Database on July 19, 2023, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-3519 actively exploited?
Yes. CISA added CVE-2023-3519 to the Known Exploited Vulnerabilities catalog on July 19, 2023, affecting Citrix NetScaler ADC and NetScaler Gateway. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2023-3519?
CVE-2023-3519 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2023-3519?
CVE-2023-3519 affects Citrix NetScaler ADC and NetScaler Gateway. 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-2023-3519?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-3519, 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-2023-3519

Explore →

Is Your Infrastructure Affected by CVE-2023-3519?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs