CVE-2026-11858

HIGHPre-NVD 8.48.4—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.4 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.1%, top 97% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
8.4
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.4Exploit: NoneExposed: 0

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

Quanos SCHEMA ST4 on-premises contains a local privilege escalation vulnerability in the Client Update Service. The update service runs as NT AUTHORITY\SYSTEM and exposes a .NET Remoting interface over a named pipe without sufficient access controls or authorization. A local authenticated low-privileged user can connect to the interface and invoke privileged update methods such as Update(). This allows arbitrary file write and delete operations with SYSTEM privileges and can be used to achieve local privilege escalation.

CVSS v3
8.4
EG Score
8.4(medium)
EPSS
2.6%
KEV
Not listed

Published

June 17, 2026

Last Modified

June 17, 2026

Advisory Details (1)

Auto-updated Jun 18, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

Multiple Vulnerabilities in Quanos Content Solutions SCHEMA ST4 - SEC Consult

https://r.sec-consult.com/quanos

Vendor Advisories for CVE-2026-11858(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 29× in last 7d / 95× 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.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-11858?
CVE-2026-11858 is a high vulnerability published on June 17, 2026. Quanos SCHEMA ST4 on-premises contains a local privilege escalation vulnerability in the Client Update Service. The update service runs as NT AUTHORITY\SYSTEM and exposes a .NET Remoting interface over a named pipe without sufficient access controls or authorization. A local authenticated…
When was CVE-2026-11858 disclosed?
CVE-2026-11858 was first published in the National Vulnerability Database 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-2026-11858 actively exploited?
CVE-2026-11858 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-11858?
CVE-2026-11858 has a CVSS v3 base score of 8.4 (NVD).
How do I remediate CVE-2026-11858?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-11858, 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

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