CVE-2025-3946

HIGHNVD 8.28.2
EchelonGraph scoreMEDIUM confidence

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

Score 8.2 from GitHub Security Advisory (severity: HIGH) published 2025-07-10. NVD baseline CVSS 8.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
8.2EG
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: 0.6%CVSS: 8.2Exploit: None knownExposed services: Not assessed

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

The Honeywell Experion PKS

and OneWireless WDM

contains a Deployment of Wrong Handler

vulnerability

in the component Control Data Access (CDA). An attacker could potentially exploit this vulnerability, leading to

Input Data Manipulation,

which could result in incorrect handling of packets leading to remote code execution.

Honeywell recommends updating to the most recent version of Honeywell Experion PKS:520.2 TCU9 HF1 and 530.1 TCU3 HF1 and OneWireless: 322.5 and 331.1.

The affected Experion PKS products are C300 PCNT02, C300 PCNT05, FIM4, FIM8, UOC, CN100, HCA, C300PM, and C200E. The Experion PKS versions affected are from 520.1 through 520.2 TCU9 and from 530 through 530 TCU3. The OneWireless WDM affected versions are 322.1 through 322.4 and 330.1 through 330.3.

CVSS v3
8.2
EG Score
8.2HIGHmedium confidence
EG Risk
37
EG Risk 37/100

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)
Severity82% × 45%
The EG Score, 8.2 of 10.
Exploitation0.5% × 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 within your standard update timelines, and watch for a fix.
EPSS PROB
0.6%
EPSS %ILE
44th
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 within your standard update timelines, and watch for a 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 10, 2025

Last Modified

April 15, 2026

Advisory Details (1)

Auto-updated Sep 8, 2026
No fix on record yet.
Web page

Process Automation | Honeywell

https://process.honeywell.com/

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 10× in last 7d / 26× 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 87 of 175 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. 13 repeat rows among the latest 100 are merged into the row they repeat. The 88 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-11 20:39 UTCEG score recompute
  2. 2026-10-11 18:50 UTCEG score recompute
  3. 2026-10-11 15:27 UTCEG score recompute
  4. 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  5. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  6. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  7. 2026-10-08 17:09 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  8. 2026-10-07 23:46 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  9. 2026-10-06 15:16 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  10. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  11. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  12. 2026-10-03 14:24 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  13. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  14. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  15. 2026-09-28 13:50 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  16. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  17. 2026-09-26 00:24 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  18. 2026-09-24 14:02 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  19. 2026-09-23 13:47 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  20. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  21. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.5% · 41st percentile
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  23. 2026-09-16 14:07 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  24. 2026-09-16 05:14 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  25. 2026-09-13 16:46 UTCEPSS rescoreEPSS 0.5% · 40th percentile
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  1. 2026-09-12 15:00 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  2. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  3. 2026-09-11 09:35 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  4. 2026-09-10 09:33 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  5. 2026-09-08 21:59 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  6. 2026-09-07 16:00 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  7. 2026-09-06 13:46 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  8. 2026-09-04 05:05 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  9. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  10. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  11. 2026-09-01 04:38 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  12. 2026-08-30 19:16 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  13. 2026-08-30 01:21 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  14. 2026-08-28 21:40 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  15. 2026-08-27 14:24 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  16. 2026-08-26 14:45 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  17. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  18. 2026-08-23 00:18 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  19. 2026-08-21 23:48 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  20. 2026-08-20 22:54 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  21. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  22. 2026-08-18 13:47 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  23. 2026-08-17 13:46 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  24. 2026-08-16 14:55 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  25. 2026-08-16 02:13 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  26. 2026-08-15 01:29 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  27. 2026-08-13 21:59 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  28. 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  29. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  30. 2026-08-08 16:36 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  31. 2026-08-07 16:26 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  32. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  33. 2026-08-04 15:09 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  34. 2026-08-04 10:37 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  35. 2026-08-03 10:35 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  36. 2026-08-02 02:26 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  37. 2026-08-01 04:15 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  38. 2026-07-30 16:27 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  39. 2026-07-30 01:29 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  40. 2026-07-28 15:35 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  41. 2026-07-26 14:54 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  42. 2026-07-25 14:17 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  43. 2026-07-24 14:17 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  44. 2026-07-23 02:55 UTCEG score recompute
  45. 2026-07-22 14:07 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  46. 2026-07-21 15:24 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  47. 2026-07-20 17:07 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  48. 2026-07-19 14:30 UTCEPSS rescoreEPSS 0.5% · 37th percentile
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  52. 2026-07-15 16:57 UTCEPSS rescoreEPSS 0.5% · 37th percentile
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  57. 2026-07-11 08:27 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  58. 2026-07-09 19:09 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  59. 2026-07-07 13:45 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  60. 2026-07-06 16:27 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  61. 2026-07-06 02:23 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  62. 2026-07-05 02:30 UTCEPSS rescoreEPSS 0.5% · 37th percentile

Related CVEs(same CWE)

Same CWE

1 shown

CWE-430

Frequently asked(5)

What is CVE-2025-3946?
CVE-2025-3946 is a high-severity vulnerability; its CVE record was published on July 10, 2025. The Honeywell Experion PKS and OneWireless WDM contains a Deployment of Wrong Handler vulnerability in the component Control Data Access (CDA). An attacker could potentially exploit this vulnerability, leading to Input Data Manipulation, which could result in incorrect handling of packets leading…
When was the CVE record for CVE-2025-3946 published?
The CVE record for CVE-2025-3946 was published on July 10, 2025. 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 April 15, 2026; the record at its source may have been updated since.
Is CVE-2025-3946 actively exploited?
CVE-2025-3946 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (44th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2025-3946?
CVE-2025-3946 has a CVSS v3 base score of 8.2 (NVD).
How do I remediate CVE-2025-3946?
No fix for CVE-2025-3946 is confirmed yet. Until one is published, restrict network exposure of the affected system — for example, keep it off the internet or limit it to trusted networks — and watch for a fix.

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