TI-2025-03491 Aliases CVE-2025-3947 GHSA-96x3-56x6-r6f5

Integer underflow during processing of short network packets in CDA FTEB responder

LOW 36CWE-191Published 2025-07-10 · Updated 2025-08-04

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

The Honeywell Experion PKS contains an Integer Underflow vulnerability in the component Control Data Access (CDA). An attacker could potentially exploit this vulnerability, leading to Input Data Manipulation, which could result in improper integer data value checking during subtraction leading to a denial of service. Honeywell recommends updating to the most recent version of Honeywell Experion PKS:520.2 TCU9 HF1 and 530.1 TCU3 HF1. 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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00367 30th 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	C300 PCNT05	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	UOC	520.1 – 520.2 TCU9; 530 – 530 TCU3	—	No fix listed	CNA
Honeywell	CN100	520.1 – 520.2 TCU9; 530 – 530 TCU3	—	No fix listed	CNA
Honeywell	HCA	520.1 – 520.2 TCU9; 530 – 530 TCU3	—	No fix listed	CNA
Honeywell	C300PM	520.1 – 520.2 TCU9; 530 – 530 TCU3	—	No fix listed	CNA
Honeywell	C200E	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
C300 PCNT05 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
UOC VendorHoneywell Affected 520.1 – 520.2 TCU9; 530 – 530 TCU3 Fixed in — No fix listed CNA
CN100 VendorHoneywell Affected 520.1 – 520.2 TCU9; 530 – 530 TCU3 Fixed in — No fix listed CNA
HCA VendorHoneywell Affected 520.1 – 520.2 TCU9; 530 – 530 TCU3 Fixed in — No fix listed CNA
C300PM VendorHoneywell Affected 520.1 – 520.2 TCU9; 530 – 530 TCU3 Fixed in — No fix listed CNA
C200E 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-2025-3947
2026-10-03 Alias added: GHSA-96x3-56x6-r6f5

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