CVE-2026-8312

HIGHNVD 7.37.3—
EchelonGraph scoreMEDIUM confidence

Score 7.3 from GitHub Security Advisory (severity: HIGH) published 2026-07-14. NVD baseline CVSS 7.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
7.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.3Exploit: None knownExposed: 0

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

A security issue exists within Arena® Simulation due to a memory corruption vulnerability in the expmt.exe (Siman) component. The vulnerability stems from improper validation of user-supplied data, which can result in an out-of-bounds write. An attacker could leverage this vulnerability to execute arbitrary code in the context of the current process by convincing a user to open a malicious file.

CVSS v3
7.3
EG Score
7.3(medium)
EG Risk
33(Track)
EG Risk 33/100SSVC: Track

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
Severity73% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
14%
KEV
Not listed

Published

July 14, 2026

Last Modified

July 15, 2026

Advisory Details (1)

Auto-updated Jul 14, 2026
No patch confirmed yet.
generic

SD1784 | Security Advisory | Rockwell Automation | US

https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1784.html

Vendor Advisories for CVE-2026-8312(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 20× in last 7d / 107× 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 150 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-8312?
CVE-2026-8312 is a high vulnerability published on July 14, 2026. A security issue exists within Arena® Simulation due to a memory corruption vulnerability in the expmt.exe (Siman) component. The vulnerability stems from improper validation of user-supplied data, which can result in an out-of-bounds write. An attacker could leverage this vulnerability to execute…
When was CVE-2026-8312 disclosed?
CVE-2026-8312 was first published in the National Vulnerability Database on July 14, 2026, with the most recent update on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-8312 actively exploited?
CVE-2026-8312 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 86.4% of all scored CVEs.
What is the CVSS score of CVE-2026-8312?
CVE-2026-8312 has a CVSS v3 base score of 7.3 (NVD).
How do I remediate CVE-2026-8312?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-8312, 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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