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: 0.9%CVSS: 5.3Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

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
5.3MEDIUMmedium confidence
EG Risk
55
EG Risk 55/100CISA SSVC

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%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.9%
EPSS %ILE
57th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

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 14× in last 7d / 64× 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 163 total refreshes for this CVE.

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

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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 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 0.9% probability of exploitation in the next 30 days (57th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-18582?
CVE-2026-18582 has a CVSS base score of 5.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-18582?
A fix for CVE-2026-18582 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-18582 are linked in the Vendor Advisories panel on this page.

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