CVE-2026-51219

HIGHPre-NVD 7.57.5
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This high-severity CVE scores 7.5 under CISA-ADP (Vulnrichment) CVSS v3.1 (NVD's own analysis pending). EPSS exploit probability: 0.7% (52nd percentile of EPSS-scored CVEs). GitHub Security Advisory CVSS 6.5 is lower than this score; a lower GitHub score revises it only when its advisory is newer than the CVE record's last change, and this advisory (published 2026-06-30) is not newer than that change (2026-08-04), so it does not.

Triggered by: Headline CVSS from CISA-ADP (Vulnrichment) CVSS v3.1
Sources: CISA-ADP (Vulnrichment) CVSS v3.1, EPSS, GitHub Security Advisory
Elevated

Also known asEUVD-2026-40245 (ENISA EUVD) · GHSA-27wh-38h4-pr2j (GitHub Security Advisories)Source: ENISA EUVD

7.5EG
EchelonGraph verdictPlan mitigationNo fix is confirmed yet: check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.7%CVSS: 7.5Exploit: No code on recordExposed services: Not assessed

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

A heap buffer overflow in the HighPriorityASDUQueue_hasUnconfirmedIMessages function of lib60870 v2.3.3 to v2.3.6 allows attackers to cause a Denial of Service (DoS) via a crafted payload.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
50
EG Risk 50/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity75% × 45%
Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: No fix is confirmed yet. Check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule.
EPSS PROB
0.7%
EPSS %ILE
52nd
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.5): severity, escalated by confirmed exploitation. This CVE's 7.5 is its impact severity (EG Severity), not escalated.

EG Severity
7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.CISA-ADP (Vulnrichment) CVSS v3.1 · CVSS v3.1
EG Likelihood
0.7% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-06). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

No fix is confirmed yet. Check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

June 29, 2026

Last Modified

August 4, 2026

Advisory Details (3)

Auto-updated Jun 30, 2026
No fix on record yet.
Web page

Heap-buffer-overflow in `HighPriorityASDUQueue_hasUnconfirmedIMessages` due to inconsistent high-priority queue entry format in v2.3.6 · Issue #196 · mz-automation/lib60870 · GitHub

https://github.com/mz-automation/lib60870/issues/196
Web page

Releases · mz-automation/lib60870 · GitHub

https://github.com/mz-automation/lib60870/releases
Web page

GitHub - mz-automation/lib60870: Official repository for lib60870 an implementation of the IEC 60870-5-101/104 protocol (read-only mirror) · GitHub

https://github.com/mz-automation/lib60870

Vendor Advisories for CVE-2026-51219(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 8× in last 7d / 34× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed its CVE.org record (CNA or CISA ADP). An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 262 rows on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 162 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-13 16:53 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  2. 2026-11-12 16:34 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  3. 2026-11-11 16:40 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  4. 2026-11-10 16:44 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  5. 2026-11-09 16:35 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  6. 2026-11-08 16:39 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  7. 2026-11-07 16:39 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  8. 2026-11-06 21:02 UTCEchelonGraph re-scored
  9. 2026-11-06 21:02 UTCGHSA enrichmentGHSA-27wh-38h4-pr2j · GitHub severity MODERATE · GitHub CVSS 6.5
  10. 2026-11-06 16:38 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  11. 2026-11-05 16:38 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  12. 2026-11-04 16:35 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  13. 2026-11-03 16:48 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  14. 2026-11-02 16:45 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  15. 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  16. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  17. 2026-10-31 01:53 UTCEchelonGraph re-scored
  18. 2026-10-31 01:53 UTCGHSA enrichmentGHSA-27wh-38h4-pr2j · GitHub CVSS 6.5
  19. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  20. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  21. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  22. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  23. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  24. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  25. 2026-10-25 14:21 UTCEchelonGraph re-scored
Show 75 more
  1. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  2. 2026-10-24 06:44 UTCEchelonGraph re-scored
  3. 2026-10-24 06:44 UTCGHSA enrichmentGHSA-27wh-38h4-pr2j · GitHub CVSS 6.5
  4. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  5. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  6. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  7. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  8. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  9. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  10. 2026-10-18 03:33 UTCEchelonGraph re-scored
  11. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  12. 2026-10-17 11:32 UTCEchelonGraph re-scored
  13. 2026-10-17 11:32 UTCGHSA enrichmentGHSA-27wh-38h4-pr2j · GitHub CVSS 6.5
  14. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  15. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  16. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  17. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  18. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  19. 2026-10-12 15:59 UTCEchelonGraph re-scored
  20. 2026-10-11 19:42 UTCEchelonGraph re-scored
  21. 2026-10-11 16:56 UTCEchelonGraph re-scored
  22. 2026-10-11 14:20 UTCEchelonGraph re-scored
  23. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  24. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  25. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  26. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  27. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  28. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  29. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  30. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  31. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  32. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  33. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  34. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  35. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  36. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  37. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  38. 2026-09-26 00:27 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  39. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  40. 2026-09-23 07:37 UTCEchelonGraph re-scored
  41. 2026-09-23 07:37 UTCGHSA enrichmentGHSA-27wh-38h4-pr2j · GitHub CVSS 6.5
  42. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  43. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  44. 2026-09-18 07:05 UTCEchelonGraph re-scored
  45. 2026-09-18 07:05 UTCGHSA enrichmentGHSA-27wh-38h4-pr2j · GitHub CVSS 6.5
  46. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  47. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  48. 2026-09-14 00:54 UTCEchelonGraph re-scored
  49. 2026-09-14 00:54 UTCGHSA enrichmentGHSA-27wh-38h4-pr2j · GitHub CVSS 6.5
  50. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  51. 2026-09-13 09:27 UTCGHSA enrichmentGHSA-27wh-38h4-pr2j · GitHub CVSS 6.5
  52. 2026-09-12 15:17 UTCEchelonGraph re-scored
  53. 2026-09-12 15:17 UTCGHSA enrichmentGHSA-27wh-38h4-pr2j · GitHub CVSS 6.5
  54. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  55. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  56. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  57. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  58. 2026-09-06 14:48 UTCEchelonGraph re-scored
  59. 2026-09-06 14:48 UTCGHSA enrichmentGHSA-27wh-38h4-pr2j · GitHub CVSS 6.5
  60. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  61. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  62. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  63. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  64. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  65. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  66. 2026-08-30 19:09 UTCEchelonGraph re-scored
  67. 2026-08-30 19:09 UTCGHSA enrichmentGHSA-27wh-38h4-pr2j · GitHub CVSS 6.5
  68. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  69. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  70. 2026-08-27 22:50 UTCEchelonGraph re-scored
  71. 2026-08-27 22:50 UTCGHSA enrichmentGHSA-27wh-38h4-pr2j · GitHub CVSS 6.5
  72. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  73. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  74. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  75. 2026-08-24 21:46 UTCEchelonGraph re-scored

Frequently asked(5)

What is CVE-2026-51219?
CVE-2026-51219 is a high-severity vulnerability; its CVE record was published on June 29, 2026. A heap buffer overflow in the HighPriorityASDUQueue_hasUnconfirmedIMessages function of lib60870 v2.3.3 to v2.3.6 allows attackers to cause a Denial of Service (DoS) via a crafted payload.
When was the CVE record for CVE-2026-51219 published?
The CVE record for CVE-2026-51219 was published on June 29, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of August 4, 2026; the record at its source may have been updated since.
Is CVE-2026-51219 actively exploited?
CVE-2026-51219 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% probability of exploitation in the next 30 days (52nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-51219?
CVE-2026-51219 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-51219?
No fix for CVE-2026-51219 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-51219 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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