CVE-2026-11857

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: 0.3%, top 81% 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 due to insecure deserialization in the .NET Remoting service. The service is configured with TypeFilterLevel.Full and is bound to local interfaces only through named pipes. A local authenticated attacker can connect to the local named pipe, obtain the .NET Remoting endpoint, and send specially crafted serialized objects. Successful exploitation results in arbitrary code execution in the context of the update process with NT AUTHORITY\SYSTEM privileges. Network-only exploitation is not possible and local host access with an authenticated user session is required.

CVSS v3
8.4
EG Score
8.4(medium)
EPSS
19.1%
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-2026-11857(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 34× in last 7d / 102× 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 102 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-11857?
CVE-2026-11857 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 due to insecure deserialization in the .NET Remoting service. The service is configured with TypeFilterLevel.Full and is bound to local interfaces only through named pipes. A local…
When was CVE-2026-11857 disclosed?
CVE-2026-11857 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-2026-11857 actively exploited?
CVE-2026-11857 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 19.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-11857?
CVE-2026-11857 has a CVSS v3 base score of 8.4 (NVD).
How do I remediate CVE-2026-11857?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-11857, 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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