CVE-2025-2521

Lack of indexes’ validation against buffer borders leads to remote code execution.

Published Jul 10, 2025 CVSS 3.1 · 8.6 High EPSS < 1% KEV · Not listed

Description

The Honeywell Experion PKS and OneWireless WDM contains a Memory Buffer vulnerability in the component Control Data Access (CDA). An attacker could potentially exploit this vulnerability, leading to an Overread Buffers, which could result in improper index validation against buffer borders 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

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Honeywell

C300 PCNT02

unaffected

Version	Status	Constraints
`520.1`	affected	≤ 520.2 TCU9
`530`	affected	≤ 530 TCU3

Honeywell

C300 PCNT05

unaffected

Version	Status	Constraints
`520.1`	affected	≤ 520.2 TCU9
`530`	affected	≤ 530 TCU3

Honeywell

FIM4

unaffected

Version	Status	Constraints
`520.1`	affected	≤ 520.2 TCU9
`530`	affected	≤ 530 TCU3

Honeywell

FIM8

unaffected

Version	Status	Constraints
`520.1`	affected	≤ 520.2 TCU9
`530`	affected	≤ 530 TCU3

Honeywell

UOC

unaffected

Version	Status	Constraints
`520.1`	affected	≤ 520.2 TCU9
`530`	affected	≤ 530 TCU3

Honeywell

CN100

unaffected

Version	Status	Constraints
`520.1`	affected	≤ 520.2 TCU9
`530`	affected	≤ 530 TCU3

Honeywell

HCA

unaffected

Version	Status	Constraints
`520.1`	affected	≤ 520.2 TCU9
`530`	affected	≤ 530 TCU3

Honeywell

C300PM

unaffected

Version	Status	Constraints
`520.1`	affected	≤ 520.2 TCU9
`530`	affected	≤ 530 TCU3

Honeywell

C200E

unaffected

Version	Status	Constraints
`520.1`	affected	≤ 520.2 TCU9
`530`	affected	≤ 530 TCU3

Honeywell

Wireless Device Manager

unaffected

Version	Status	Constraints
`322.1`	affected	≤ 322.4
`330.1`	affected	≤ 330.3

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

Source	ID	Title
EUVD	EUVD-2025-21067	The Honeywell Experion PKS and OneWireless WDM contains a Memory Buffer vulnerability in the component Control Data Access (CDA). An attacker could potentially exploit this vulnerability, leading to an Overread Buffers, which could result in improper index validation against buffer borders 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.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.502% probability within 30 days)

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://process.honeywell.com/

History

Jul 16, 2025 1:45 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics	epss `{'score': 0.00202}`	epss `{'score': 0.00265}`

Jul 11, 2025 1:45 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		epss `{'score': 0.00202}`

Jul 10, 2025 9:15 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Jul 10, 2025 8:30 PM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		The Honeywell Experion PKS and OneWireless WDM contains a Memory Buffer vulnerability in the component Control Data Access (CDA). An attacker could potentially exploit this vulnerability, leading to an Overread Buffers, which could result in improper index validation against buffer borders 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.
Title		Lack of indexes’ validation against buffer borders leads to remote code execution.
Weaknesses		CWE-119
References		https://process.honeywell.com/
Metrics		cvssV3_1 `{'score': 8.6, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H'}`