# CVE-2025-3946

## Summary

- **CVE ID:** CVE-2025-3946
- **Severity:** HIGH
- **CVSS Score:** 8.2 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H)
- **CWE:** CWE-430
- **Published:** Jul 10, 2025
- **Last Modified:** Mar 12, 2026

## Description

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.

## Affected Products

- Honeywell — C300 PCNT02 (520.1)
- Honeywell — C300 PCNT02 (530)
- Honeywell — C300 PCNT05 (520.1)
- Honeywell — C300 PCNT05 (530)
- Honeywell — FIM4 (520.1)
- Honeywell — FIM4 (530)
- Honeywell — FIM8 (520.1)
- Honeywell — FIM8 (530)
- Honeywell — UOC (520.1)
- Honeywell — UOC (530)
- Honeywell — CN100 (520.1)
- Honeywell — CN100 (530)
- Honeywell — HCA (520.1)
- Honeywell — HCA (530)
- Honeywell — C300PM (520.1)
- Honeywell — C300PM (530)
- Honeywell — C200E (520.1)
- Honeywell — C200E (530)
- Honeywell — Wireless Device Manager (322.1)
- Honeywell — Wireless Device Manager (330.1)

## References

- [CNA](https://process.honeywell.com/)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.49%
- **EPSS Percentile:** 40.5

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._