CVE-2026-52134

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-01. 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.

An issue in the parseGoosePayload() function (/goose/goose_receiver.c) of libiec61850 v1.6 allows attackers to bypass authentication via a captured GOOSE frame.

CVSS v3
9.8
EG Score
9.8(high)
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

July 31, 2026

Last Modified

August 3, 2026

Advisory Details (3)

Auto-updated Aug 17, 2026
No patch confirmed yet.
generic

GitHub - if-forget/CVE-2026-52134-libiec61850: Public technical advisory and reproduction evidence for CVE-2026-52134 affecting GOOSE replay handling in libiec61850 v1.6. · GitHub

https://github.com/if-forget/CVE-2026-52134-libiec61850
generic

libiec61850/src/goose/goose_receiver.c at v1.6 · mz-automation/libiec61850 · GitHub

https://github.com/mz-automation/libiec61850/tree/v1.6/src/goose/goose_receiver.c
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

Vendor Advisories for CVE-2026-52134(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 53× in last 7d / 144× 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 144 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-52134?
CVE-2026-52134 is a critical vulnerability published on July 31, 2026. An issue in the parseGoosePayload() function (/goose/goose_receiver.c) of libiec61850 v1.6 allows attackers to bypass authentication via a captured GOOSE frame.
When was CVE-2026-52134 disclosed?
CVE-2026-52134 was first published in the National Vulnerability Database on July 31, 2026, with the most recent update on August 3, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-52134 actively exploited?
CVE-2026-52134 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 46.2% of all scored CVEs.
What is the CVSS score of CVE-2026-52134?
CVE-2026-52134 has a CVSS v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-52134?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-52134, 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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