CVE-2026-67868

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-18. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this weekElevated
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: Elevated riskExposed: 0

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

A heap-based out-of-bounds write vulnerability exists in S2OPC 1.7.3 in server-side EventFilter handling during CreateMonitoredItems processing. This allows a remote attacker to execute arbitrary code.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
75(Attend)
EG Risk 75/100SSVC: 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%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
54%
KEV
Not listed

Published

August 17, 2026

Last Modified

September 9, 2026

Advisory Details (5)

Auto-updated Sep 16, 2026
No patch confirmed yet.
generic

Server-side `heap-buffer-overflow` in EventFilter WhereClause result handling · Issue #16 · gff-cw/information · GitHub

https://github.com/gff-cw/information/issues/16
generic

Server-side heap-buffer-overflow in EventFilter WhereClause result handling (#1779) · Issues · Systerel / S2OPC · GitLab

https://gitlab.com/systerel/S2OPC/-/work_items/1779
generic

S2OPC/samples/ClientServer/demo_server_alarms at S2OPC_Toolkit_1.7.3 · systerel/S2OPC · GitHub

https://github.com/systerel/S2OPC/tree/S2OPC_Toolkit_1.7.3/samples/ClientServer/demo_server_alarms
generic

S2OPC/src/ClientServer/services/b2c/monitored_item_event_filter_where_clause_bs.c at b4c5c7d63cd69698461d514b905a7c92b3c377c4 · systerel/S2OPC · GitHub

https://github.com/systerel/S2OPC/blob/b4c5c7d63cd69698461d514b905a7c92b3c377c4/src/ClientServer/services/b2c/monitored_item_event_filter_where_clause_bs.c
generic

S2OPC/src/ClientServer/services/b2c/monitored_item_event_filter_treatment_bs.c at b4c5c7d63cd69698461d514b905a7c92b3c377c4 · systerel/S2OPC · GitHub

https://github.com/systerel/S2OPC/blob/b4c5c7d63cd69698461d514b905a7c92b3c377c4/src/ClientServer/services/b2c/monitored_item_event_filter_treatment_bs.c

Vendor Advisories for CVE-2026-67868(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 51× in last 7d / 222× 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 261 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-67868?
CVE-2026-67868 is a critical vulnerability published on August 17, 2026. A heap-based out-of-bounds write vulnerability exists in S2OPC 1.7.3 in server-side EventFilter handling during CreateMonitoredItems processing. This allows a remote attacker to execute arbitrary code.
When was CVE-2026-67868 disclosed?
CVE-2026-67868 was first published in the National Vulnerability Database on August 17, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-67868 actively exploited?
CVE-2026-67868 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 46.1% of all scored CVEs.
What is the CVSS score of CVE-2026-67868?
CVE-2026-67868 has a CVSS v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-67868?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-67868, 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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