TI-2025-02191 Aliases CVE-2025-2520 GHSA-235q-27q4-67jx

Dereferencing of an uninitialized pointer leads to denial of service.

LOW 33CWE-457Published 2025-07-10 · Updated 2025-08-04

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-457 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00421 36th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Honeywell	C300 PCNT02	520.1 – 520.2 TCU9; 530 – 530 TCU3	—	No fix listed	CNA
Honeywell	EHB	520.1 – 520.2 TCU9; 530 – 530 TCU3	—	No fix listed	CNA
Honeywell	EHPM	520.1 – 520.2 TCU9; 530 – 530 TCU3	—	No fix listed	CNA
Honeywell	ELMM	520.1 – 520.2 TCU9; 530 – 530 TCU3	—	No fix listed	CNA
Honeywell	Classic ENIM	520.1 – 520.2 TCU9; 530 – 530 TCU3	—	No fix listed	CNA
Honeywell	ETN	520.1 – 520.2 TCU9; 530 – 530 TCU3	—	No fix listed	CNA
Honeywell	FIM4	520.1 – 520.2 TCU9; 530 – 530 TCU3	—	No fix listed	CNA
Honeywell	FIM8	520.1 – 520.2 TCU9; 530 – 530 TCU3	—	No fix listed	CNA
Honeywell	PGM	520.1 – 520.2 TCU9; 530 – 530 TCU3	—	No fix listed	CNA
Honeywell	RFIM	520.1 – 520.2 TCU9; 530 – 530 TCU3	—	No fix listed	CNA

C300 PCNT02 VendorHoneywell Affected 520.1 – 520.2 TCU9; 530 – 530 TCU3 Fixed in — No fix listed CNA
EHB VendorHoneywell Affected 520.1 – 520.2 TCU9; 530 – 530 TCU3 Fixed in — No fix listed CNA
EHPM VendorHoneywell Affected 520.1 – 520.2 TCU9; 530 – 530 TCU3 Fixed in — No fix listed CNA
ELMM VendorHoneywell Affected 520.1 – 520.2 TCU9; 530 – 530 TCU3 Fixed in — No fix listed CNA
Classic ENIM VendorHoneywell Affected 520.1 – 520.2 TCU9; 530 – 530 TCU3 Fixed in — No fix listed CNA
ETN VendorHoneywell Affected 520.1 – 520.2 TCU9; 530 – 530 TCU3 Fixed in — No fix listed CNA
FIM4 VendorHoneywell Affected 520.1 – 520.2 TCU9; 530 – 530 TCU3 Fixed in — No fix listed CNA
FIM8 VendorHoneywell Affected 520.1 – 520.2 TCU9; 530 – 530 TCU3 Fixed in — No fix listed CNA
PGM VendorHoneywell Affected 520.1 – 520.2 TCU9; 530 – 530 TCU3 Fixed in — No fix listed CNA
RFIM VendorHoneywell Affected 520.1 – 520.2 TCU9; 530 – 530 TCU3 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2025-2520
2026-10-03 Alias added: GHSA-235q-27q4-67jx

References

Other 1

https://process.honeywell.com/

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TI-2021-22482 WIN-PACK PRO 4.8 - 'WPCommandFileService' Unquoted Service Path CVSS 4.0HIGH 8.5
TI-2021-22480 WIN-PACK PRO 4.8 - 'GuardTourService' Unquoted Service Path CVSS 4.0HIGH 8.5
TI-2007-02844 Buffer overflow in the BaseRunner ActiveX control in the Ademco ATNBaseLoader100 Module… CVSS 2.0HIGH 10.0
TI-2023-18324 MAS (a Carrier brand) MASmobile Classic Authorization Bypass CVSS 3.1MEDIUM 6.5
TI-2023-28253 XML external entity injection in Honeywell Saia PG5 Controls Suite CVSS 3.1MEDIUM 6.5

See all 132 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences