CVE-2026-67867

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-06. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this weekElevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: Elevated riskExposed: 0

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

Buffer Overflow vulnerability in Systerel S2OPC 1.7.3 allows a remote attacker to cause a denial of service via the Alarm/Conditions wrapper when processing PublishResponse EventNotificationList data

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
65(Attend)
EG Risk 65/100SSVC: 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
Severity75% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
40%
KEV
Not listed

Published

August 5, 2026

Last Modified

August 31, 2026

Advisory Details (5)

Auto-updated Aug 6, 2026
No patch confirmed yet.
generic

Client alarm_conditions out-of-bounds read via PublishResponse EventFieldList count mismatch (#1781) · Issues · Systerel / S2OPC · GitLab

https://gitlab.com/systerel/S2OPC/-/work_items/1781
generic

S2OPC/src/ClientServer/address_space/sopc_event_manager.c at S2OPC_Toolkit_1.7.3 · systerel/S2OPC · GitHub

https://github.com/systerel/S2OPC/blob/S2OPC_Toolkit_1.7.3/src/ClientServer/address_space/sopc_event_manager.c
generic

S2OPC/src/ClientServer/frontend/client_wrapper/internal/state_machine.c at S2OPC_Toolkit_1.7.3 · systerel/S2OPC · GitHub

https://github.com/systerel/S2OPC/blob/S2OPC_Toolkit_1.7.3/src/ClientServer/frontend/client_wrapper/internal/state_machine.c
generic

S2OPC/src/ClientServer/frontend/client_wrapper/alarm_conditions/libs2opc_client_alarm_conditions.c at S2OPC_Toolkit_1.7.3 · systerel/S2OPC · GitHub

https://github.com/systerel/S2OPC/blob/S2OPC_Toolkit_1.7.3/src/ClientServer/frontend/client_wrapper/alarm_conditions/libs2opc_client_alarm_conditions.c
generic

Client alarm_conditions out-of-bounds read via `PublishResponse` `EventFieldList` count mismatch · Issue #18 · gff-cw/information · GitHub

https://github.com/gff-cw/information/issues/18

Vendor Advisories for CVE-2026-67867(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 21× in last 7d / 94× 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 160 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-67867?
CVE-2026-67867 is a high vulnerability published on August 5, 2026. Buffer Overflow vulnerability in Systerel S2OPC 1.7.3 allows a remote attacker to cause a denial of service via the Alarm/Conditions wrapper when processing PublishResponse EventNotificationList data
When was CVE-2026-67867 disclosed?
CVE-2026-67867 was first published in the National Vulnerability Database on August 5, 2026, with the most recent update on August 31, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-67867 actively exploited?
CVE-2026-67867 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 60.5% of all scored CVEs.
What is the CVSS score of CVE-2026-67867?
CVE-2026-67867 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-67867?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-67867, 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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