CVE-2016-4523

CRITICALNVD 7.59.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2022-04-15), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 7.5 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
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 31%CVSS: 7.5Exploit: cisa kev · ssvc active · epss top5pctExposed: 0

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

The WAP interface in Trihedral VTScada (formerly VTS) 8.x through 11.x before 11.2.02 allows remote attackers to cause a denial of service (out-of-bounds read and application crash) via unspecified vectors.

CVSS v3
7.5
EG Score
9.0(high)
EG Risk
96(Attend)
EG Risk 96/100SSVC: 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
Severity90% × 45%
Exploitation100% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
31%
EPSS %ILE
98%
KEV
⚠ Exploited

Published

June 9, 2016

Last Modified

June 17, 2026

Advisory Details (3)

Auto-updated May 19, 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-2016-4523
generic

ZDI-16-405 | Zero Day Initiative

http://www.zerodayinitiative.com/advisories/ZDI-16-405
generic
http://www.securityfocus.com/bid/91077

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 60× in last 7d / 252× 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 939 total refreshes for this CVE.

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

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Frequently asked(6)

What is CVE-2016-4523?
CVE-2016-4523 is a critical vulnerability published on June 9, 2016. The WAP interface in Trihedral VTScada (formerly VTS) 8.x through 11.x before 11.2.02 allows remote attackers to cause a denial of service (out-of-bounds read and application crash) via unspecified vectors.
When was CVE-2016-4523 disclosed?
CVE-2016-4523 was first published in the National Vulnerability Database on June 9, 2016, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2016-4523 actively exploited?
Yes. CISA added CVE-2016-4523 to the Known Exploited Vulnerabilities catalog on April 15, 2022, affecting Trihedral VTScada (formerly VTS). KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2016-4523?
CVE-2016-4523 has a CVSS v3 base score of 7.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2016-4523?
CVE-2016-4523 affects Trihedral VTScada (formerly VTS). 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-2016-4523?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-4523, 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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