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CVE-2025-2521

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

Published: Jul 10, 2025Updated: Jul 15, 2025 Sources: CVE List NVD BDU csafCWE-119
NVD MITRE
8.6CVSSHIGH
EPSS Score
0.4%
Top 66.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:LI:LA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:HAvailability
High
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Weaknesses

CWE-119

Affected Products

C300 PCNT02HoneywellICS / OT / IoT
C300 PCNT05HoneywellICS / OT / IoT
FIM4HoneywellICS / OT / IoT
FIM8HoneywellICS / OT / IoT
UOCHoneywellICS / OT / IoT
honeywellcommercialUSICS / OT / IoTaka experion server, saia pg5 controls suite, experion pks
and 7 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://process.honeywell.com/
process.honeywell.com
https://process.honeywell.com/
process.honeywell.com
https://www.cisa.gov/news-events/ics-advisories/icsa-25-205-03
cisa.gov
and 20 more references View all →

Timeline

Published
Jul 10, 2025
Last Updated
Jul 15, 2025

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