CVE-2026-54429

HIGHPre-NVD 7.47.4
EchelonGraph scoreMEDIUM confidence

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

Score 7.4 from GitHub Security Advisory published 2026-07-14. A secondary CVSS source baseline 7.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
7.4EG
EchelonGraph verdictPlan mitigationRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 7.4Exploit: None knownExposed services: Not assessed

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

A vulnerability has been identified in SIMATIC S7-PLCSIM Advanced (All versions). Affected devices do not properly handle high-volume multicast network traffic, which can exhaust available memory resources in the affected application. This could allow an unauthenticated attacker on the local network segment to cause a denial-of-service condition of the affected application. The affected application becomes inaccessible and requires a manual restart; no project data is lost. Successful exploitation requires a specific project configuration to be already active on the targeted instance.

CVSS v3
7.4
EG Score
7.4HIGHmedium confidence
EG Risk
33
EG Risk 33/100

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 (value × EchelonGraph’s weight)
Severity74% × 45%
The EG Score, 7.4 of 10.
Exploitation0.3% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (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. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.3%
EPSS %ILE
17th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (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.

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

July 14, 2026

Last Modified

July 15, 2026

Advisory Details (1)

Auto-updated Jul 14, 2026
No fix on record yet.
Web page

SSA-828211

https://cert-portal.siemens.com/productcert/html/ssa-828211.html

Vendor Advisories for CVE-2026-54429(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 11× in last 7d / 38× 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 it from the CNA feed. 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). Most recent first.

Showing the most recent 100 of 210 refreshes 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 110 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  3. 2026-10-12 15:56 UTCEG score recompute
  4. 2026-10-11 19:39 UTCEG score recompute
  5. 2026-10-11 16:54 UTCEG score recompute
  6. 2026-10-11 14:18 UTCEG score recompute
  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  10. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  11. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  12. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  13. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  14. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  15. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  16. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  17. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  18. 2026-10-01 13:28 UTCEG score recompute
  19. 2026-10-01 13:28 UTCGHSA enrichmentGHSA-xhg3-q2f6-w8cg · GitHub CVSS 7.4
  20. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  21. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  22. 2026-09-28 09:24 UTCEG score recompute
  23. 2026-09-28 09:24 UTCGHSA enrichmentGHSA-xhg3-q2f6-w8cg · GitHub CVSS 7.4
  24. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  25. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.3% · 16th percentile
Show 75 more
  1. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  2. 2026-09-24 09:56 UTCEG score recompute
  3. 2026-09-24 09:56 UTCGHSA enrichmentGHSA-xhg3-q2f6-w8cg · GitHub CVSS 7.4
  4. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  5. 2026-09-23 03:59 UTCEG score recompute
  6. 2026-09-23 03:59 UTCGHSA enrichmentGHSA-xhg3-q2f6-w8cg · GitHub CVSS 7.4
  7. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  8. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  9. 2026-09-18 04:57 UTCEG score recompute
  10. 2026-09-18 04:57 UTCGHSA enrichmentGHSA-xhg3-q2f6-w8cg · GitHub CVSS 7.4
  11. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  12. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  13. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  14. 2026-09-13 23:28 UTCEG score recompute
  15. 2026-09-13 23:28 UTCGHSA enrichmentGHSA-xhg3-q2f6-w8cg · GitHub CVSS 7.4
  16. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  17. 2026-09-13 07:56 UTCEG score recompute
  18. 2026-09-13 07:56 UTCGHSA enrichmentGHSA-xhg3-q2f6-w8cg · GitHub CVSS 7.4
  19. 2026-09-12 14:31 UTCGHSA enrichmentGHSA-xhg3-q2f6-w8cg · GitHub CVSS 7.4
  20. 2026-09-12 01:47 UTCEG score recompute
  21. 2026-09-12 01:47 UTCGHSA enrichmentGHSA-xhg3-q2f6-w8cg · GitHub CVSS 7.4
  22. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  23. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  24. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  25. 2026-09-08 01:49 UTCEG score recompute
  26. 2026-09-08 01:49 UTCGHSA enrichmentGHSA-xhg3-q2f6-w8cg · GitHub CVSS 7.4
  27. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  28. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  29. 2026-09-06 13:47 UTCGHSA enrichmentGHSA-xhg3-q2f6-w8cg · GitHub CVSS 7.4
  30. 2026-09-05 21:19 UTCEG score recompute
  31. 2026-09-05 21:19 UTCGHSA enrichmentGHSA-xhg3-q2f6-w8cg · GitHub CVSS 7.4
  32. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  33. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  34. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  35. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  36. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  37. 2026-08-30 18:09 UTCGHSA enrichmentGHSA-xhg3-q2f6-w8cg · GitHub CVSS 7.4
  38. 2026-08-30 05:25 UTCEG score recompute
  39. 2026-08-30 05:25 UTCGHSA enrichmentGHSA-xhg3-q2f6-w8cg · GitHub CVSS 7.4
  40. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  41. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  42. 2026-08-27 21:34 UTCEG score recompute
  43. 2026-08-27 21:34 UTCGHSA enrichmentGHSA-xhg3-q2f6-w8cg · GitHub CVSS 7.4
  44. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  45. 2026-08-27 03:46 UTCGHSA enrichmentGHSA-xhg3-q2f6-w8cg · GitHub CVSS 7.4
  46. 2026-08-26 15:01 UTCEG score recompute
  47. 2026-08-26 15:01 UTCGHSA enrichmentGHSA-xhg3-q2f6-w8cg · GitHub CVSS 7.4
  48. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  49. 2026-08-26 01:53 UTCEG score recompute
  50. 2026-08-26 01:53 UTCGHSA enrichmentGHSA-xhg3-q2f6-w8cg · GitHub CVSS 7.4
  51. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  52. 2026-08-25 10:54 UTCGHSA enrichmentGHSA-xhg3-q2f6-w8cg · GitHub CVSS 7.4
  53. 2026-08-24 22:00 UTCEG score recompute
  54. 2026-08-24 22:00 UTCGHSA enrichmentGHSA-xhg3-q2f6-w8cg · GitHub CVSS 7.4
  55. 2026-08-24 09:16 UTCGHSA enrichmentGHSA-xhg3-q2f6-w8cg · GitHub CVSS 7.4
  56. 2026-08-23 19:36 UTCGHSA enrichmentGHSA-xhg3-q2f6-w8cg · GitHub CVSS 7.4
  57. 2026-08-23 06:52 UTCGHSA enrichmentGHSA-xhg3-q2f6-w8cg · GitHub CVSS 7.4
  58. 2026-08-22 18:09 UTCGHSA enrichmentGHSA-xhg3-q2f6-w8cg · GitHub CVSS 7.4
  59. 2026-08-22 05:24 UTCEG score recompute
  60. 2026-08-22 05:24 UTCGHSA enrichmentGHSA-xhg3-q2f6-w8cg · GitHub CVSS 7.4
  61. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  62. 2026-08-21 16:40 UTCGHSA enrichmentGHSA-xhg3-q2f6-w8cg · GitHub CVSS 7.4
  63. 2026-08-21 03:35 UTCEG score recompute
  64. 2026-08-21 03:35 UTCGHSA enrichmentGHSA-xhg3-q2f6-w8cg · GitHub CVSS 7.4
  65. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  66. 2026-08-20 14:40 UTCGHSA enrichmentGHSA-xhg3-q2f6-w8cg · GitHub CVSS 7.4
  67. 2026-08-20 01:06 UTCEG score recompute
  68. 2026-08-20 01:06 UTCGHSA enrichmentGHSA-xhg3-q2f6-w8cg · GitHub CVSS 7.4
  69. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  70. 2026-08-19 12:16 UTCGHSA enrichmentGHSA-xhg3-q2f6-w8cg · GitHub CVSS 7.4
  71. 2026-08-18 23:21 UTCEG score recompute
  72. 2026-08-18 23:21 UTCGHSA enrichmentGHSA-xhg3-q2f6-w8cg · GitHub CVSS 7.4
  73. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  74. 2026-08-18 10:37 UTCGHSA enrichmentGHSA-xhg3-q2f6-w8cg · GitHub CVSS 7.4
  75. 2026-08-17 21:53 UTCEG score recompute

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Frequently asked(5)

What is CVE-2026-54429?
CVE-2026-54429 is a high-severity vulnerability; its CVE record was published on July 14, 2026. A vulnerability has been identified in SIMATIC S7-PLCSIM Advanced (All versions). Affected devices do not properly handle high-volume multicast network traffic, which can exhaust available memory resources in the affected application. This could allow an unauthenticated attacker on the local…
When was the CVE record for CVE-2026-54429 published?
The CVE record for CVE-2026-54429 was published on July 14, 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 July 15, 2026; the record at its source may have been updated since.
Is CVE-2026-54429 actively exploited?
CVE-2026-54429 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (17th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-54429?
CVE-2026-54429 has a CVSS base score of 7.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-54429?
No fix for CVE-2026-54429 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-2026-54429 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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