CVE-2026-18582

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

Score 5.3 from GitHub Security Advisory published 2026-08-03. a secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: Elevated riskExposed: 0

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

A security flaw has been discovered in mz-automation libiec61850 up to 1.6.1. This vulnerability affects the function Reporting_RCBWriteAccessHandler of the file src/iec61850/server/mms_mapping/reporting.c of the component Report Sending Path Handler. The manipulation results in free of memory not on the heap. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks. Upgrading to version 1.6.2 is able to resolve this issue. The patch is identified as 5b2a69f44256b8548927d8afdd7ac5f5381abe1e. It is suggested to upgrade the affected component. The vendor was contacted early about this disclosure.

CVSS v3
5.3
EG Score
5.3(medium)
EG Risk
55(Attend)
EG Risk 55/100SSVC: 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
Severity53% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
42%
KEV
Not listed

Published

August 3, 2026

Last Modified

August 12, 2026

Advisory Details (5)

Auto-updated Aug 3, 2026
🔬 Proof of concept available. Patch available. Sources: github_release, github, github_commit.
generic

GitHub - mz-automation/libiec61850: Official repository for libIEC61850, the open-source library for the IEC 61850 protocols · GitHub

https://github.com/mz-automation/libiec61850/
github_release Patch Available

1.6.2

Patch available: mz-automation/libiec61850 v1.6.2

https://github.com/mz-automation/libiec61850/releases/tag/v1.6.2
github_commit Patch Available

commit 5b2a69f44256 (mz-automation/libiec61850)

Patch available: mz-automation/libiec61850 v1.6.2 (contains commit 5b2a69f44256)

https://github.com/mz-automation/libiec61850/commit/5b2a69f44256b8548927d8afdd7ac5f5381abe1e
generic

`Oversized RptID` can trigger `invalid free` of a stack-backed visible string in the `report send path` · Issue #2 · gff-cw/information · GitHub

https://github.com/gff-cw/information/issues/2
github Patch Available🟡 PoC Available

Oversized RptID can trigger invalid free of a stack-backed visible string in the report send path · Advisory · mz-automation/libiec61850 · GitHub

https://github.com/mz-automation/libiec61850/security/advisories/GHSA-7qg8-hm25-rv5v

Vendor Advisories for CVE-2026-18582(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 17× in last 7d / 75× 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 133 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-18582?
CVE-2026-18582 is a medium vulnerability published on August 3, 2026. A security flaw has been discovered in mz-automation libiec61850 up to 1.6.1. This vulnerability affects the function ReportingRCBWriteAccessHandler of the file src/iec61850/server/mmsmapping/reporting.c of the component Report Sending Path Handler. The manipulation results in free of memory not on…
When was CVE-2026-18582 disclosed?
CVE-2026-18582 was first published in the National Vulnerability Database on August 3, 2026, with the most recent update on August 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-18582 actively exploited?
CVE-2026-18582 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 58.4% of all scored CVEs.
What is the CVSS score of CVE-2026-18582?
CVE-2026-18582 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-18582?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-18582, 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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