CVE-2026-8479

MEDIUMNVD 6.96.9—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.9 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 93% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
6.9
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.9Exploit: NoneExposed: 0

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

IEC 60870-5-104 used in bidirectional mode in RTU500 is vulnerable for a NULL pointer dereferencing, if a specially crafted sequence of messages is sent for a certain time, causing Denial of Service impact. Product is only affected if IEC 60870-5-104 functionality in bidirectional mode (BCI) is configured.

CVSS v3
6.9
EG Score
6.9(medium)
EPSS
6.6%
KEV
Not listed

Published

May 26, 2026

Last Modified

May 26, 2026

Advisory Details (1)

Auto-updated Jun 11, 2026
No patch confirmed yet.
generic

Hitachi Energy Publisher

https://publisher.hitachienergy.com/preview?DocumentID=8DBD000252&LanguageCode=en&DocumentPartId=&Action=Launch

Vendor Advisories for CVE-2026-8479(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 6× in last 7d / 37× 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.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-8479?
CVE-2026-8479 is a medium vulnerability published on May 26, 2026. IEC 60870-5-104 used in bidirectional mode in RTU500 is vulnerable for a NULL pointer dereferencing, if a specially crafted sequence of messages is sent for a certain time, causing Denial of Service impact. Product is only affected if IEC 60870-5-104 functionality in bidirectional mode (BCI) is…
When was CVE-2026-8479 disclosed?
CVE-2026-8479 was first published in the National Vulnerability Database on May 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-8479 actively exploited?
CVE-2026-8479 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 6.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-8479?
CVE-2026-8479 has a CVSS v3 base score of 6.9 (NVD).
How do I remediate CVE-2026-8479?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-8479, 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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