CVE-2019-11634

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
Trending — 4 sources updated this weekExploited 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: 8%CVSS: 9.8Exploit: cisa kev · ssvc active · kev ransomwareExposed: 0

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

Citrix Workspace App before 1904 for Windows has Incorrect Access Control.

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
8%
EPSS %ILE
95%
KEV
⚠ Exploited

Published

May 22, 2019

Last Modified

August 12, 2026

Advisory Details (3)

Auto-updated Sep 23, 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-2019-11634
generic

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https://support.citrix.com/v1/search?searchQuery=%22%22&lang=en&sort=cr_date_desc&prod=&pver=&ct=Security+Bulletin
generic

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https://support.citrix.com/article/CTX251986

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 63× in last 7d / 263× 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 1,002 total refreshes for this CVE.

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

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Frequently asked(6)

What is CVE-2019-11634?
CVE-2019-11634 is a critical vulnerability published on May 22, 2019. Citrix Workspace App before 1904 for Windows has Incorrect Access Control.
When was CVE-2019-11634 disclosed?
CVE-2019-11634 was first published in the National Vulnerability Database on May 22, 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-2019-11634 actively exploited?
Yes. CISA added CVE-2019-11634 to the Known Exploited Vulnerabilities catalog on November 3, 2021, affecting Citrix Workspace Application and Receiver for Windows. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2019-11634?
CVE-2019-11634 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2019-11634?
CVE-2019-11634 affects Citrix Workspace Application and Receiver for Windows. 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-2019-11634?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-11634, 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.

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