Vulnerability · Published Jul 10, 2025 · Assigned by Honeywell
CVE-2025-2521Lack of indexes’ validation against buffer borders leads to remote code execution.
High 8.6
In plain English
A high-severity memory corruption in C200E from Honeywell. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 43% of all known vulnerabilities).
Official 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 (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Honeywell | C300 PCNT02 | 520.1 – through 520.2 TCU9530 – through 530 TCU3 |
| Honeywell | C300 PCNT05 | 520.1 – through 520.2 TCU9530 – through 530 TCU3 |
| Honeywell | FIM4 | 520.1 – through 520.2 TCU9530 – through 530 TCU3 |
| Honeywell | FIM8 | 520.1 – through 520.2 TCU9530 – through 530 TCU3 |
| Honeywell | UOC | 520.1 – through 520.2 TCU9530 – through 530 TCU3 |
| Honeywell | CN100 | 520.1 – through 520.2 TCU9530 – through 530 TCU3 |
| Honeywell | HCA | 520.1 – through 520.2 TCU9530 – through 530 TCU3 |
| Honeywell | C300PM | 520.1 – through 520.2 TCU9530 – through 530 TCU3 |
| Honeywell | C200E | 520.1 – through 520.2 TCU9530 – through 530 TCU3 |
| Honeywell | Wireless Device Manager | 322.1 – through 322.4330.1 – through 330.3 |
Weakness: CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H