CVE-2025-2520

Dereferencing of an uninitialized pointer leads to denial of service.

Published Jul 10, 2025 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed

Description

The Honeywell Experion PKS contains an Uninitialized Variable in the common Epic Platform Analyzer (EPA) communications. An attacker could potentially exploit this vulnerability, leading to a Communication Channel Manipulation, which results in a dereferencing of an uninitialized pointer leading to a denial of service.

Honeywell recommends updating to the most recent version of

Honeywell Experion PKS: 520.2 TCU9 HF1and 530.1 TCU3 HF1. The affected Experion PKS products are

C300 PCNT02, EHB, EHPM, ELMM, Classic ENIM, ETN, FIM4, FIM8, PGM, and RFIM. The Experion PKS versions affected are from 520.1 through 520.2 TCU9 and from 530 through 530 TCU3.

Analysis

No analysis available yet

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

EHB

unaffected

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

Honeywell

EHPM

unaffected

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

Honeywell

ELMM

unaffected

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

Honeywell

Classic ENIM

unaffected

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

Honeywell

ETN

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

PGM

unaffected

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

Honeywell

RFIM

unaffected

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

No data.

No data available yet.

Remediation

No remediation available yet

Tracking

Advisories

Source	ID	Title
EUVD	EUVD-2025-21068	The Honeywell Experion PKS contains an Uninitialized Variable in the common Epic Platform Analyzer (EPA) communications. An attacker could potentially exploit this vulnerability, leading to a Communication Channel Manipulation, which results in a dereferencing of an uninitialized pointer leading to a denial of service. Honeywell recommends updating to the most recent version of Honeywell Experion PKS: 520.2 TCU9 HF1and 530.1 TCU3 HF1. The affected Experion PKS products are C300 PCNT02, EHB, EHPM, ELMM, Classic ENIM, ETN, FIM4, FIM8, PGM, and RFIM. The Experion PKS versions affected are from 520.1 through 520.2 TCU9 and from 530 through 530 TCU3.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

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% (0.421% 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': 0.0004}`	epss `{'score': 0.00052}`

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

Type	Values Removed	Values Added
Metrics		epss `{'score': 0.0004}`

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 8:00 PM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		The Honeywell Experion PKS contains an Uninitialized Variable in the common Epic Platform Analyzer (EPA) communications. An attacker could potentially exploit this vulnerability, leading to a Communication Channel Manipulation, which results in a dereferencing of an uninitialized pointer leading to a denial of service. Honeywell recommends updating to the most recent version of Honeywell Experion PKS: 520.2 TCU9 HF1and 530.1 TCU3 HF1. The affected Experion PKS products are C300 PCNT02, EHB, EHPM, ELMM, Classic ENIM, ETN, FIM4, FIM8, PGM, and RFIM. The Experion PKS versions affected are from 520.1 through 520.2 TCU9 and from 530 through 530 TCU3.
Title		Dereferencing of an uninitialized pointer leads to denial of service.
Weaknesses		CWE-457
References		https://process.honeywell.com/
Metrics		cvssV3_1 `{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}`