CVE-2026-51218

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under CISA-ADP (Vulnrichment) CVSS v3.1 (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 66% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this weekElevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: Elevated riskExposed: 0

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

A heap buffer overflow in the TS7Worker::PerformFunctionWrite() function (/core/s7_server.cpp) of snap7 v1.4.3 allows attackers to cause a Denial of Service (DoS) via a crafted packet.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
65(Attend)
EG Risk 65/100SSVC: 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
Severity75% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
34%
KEV
Not listed

Published

June 29, 2026

Last Modified

July 30, 2026

Advisory Details (2)

Auto-updated Jun 30, 2026
No patch confirmed yet.
generic

Issue · GitHub

https://github.com/davenardella/snap7/issues/14
generic

GitHub - davenardella/snap7: Snap7 Official repository · GitHub

https://github.com/davenardella/snap7

Vendor Advisories for CVE-2026-51218(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 7× in last 7d / 62× 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 180 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-51218?
CVE-2026-51218 is a high vulnerability published on June 29, 2026. A heap buffer overflow in the TS7Worker::PerformFunctionWrite() function (/core/s7_server.cpp) of snap7 v1.4.3 allows attackers to cause a Denial of Service (DoS) via a crafted packet.
When was CVE-2026-51218 disclosed?
CVE-2026-51218 was first published in the National Vulnerability Database on June 29, 2026, with the most recent update on July 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-51218 actively exploited?
CVE-2026-51218 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 65.6% of all scored CVEs.
What is the CVSS score of CVE-2026-51218?
CVE-2026-51218 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-51218?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-51218, 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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