CVE-2025-2523: critical vulnerability in Honeywell C300 PCNT02
Lack of buffer clearing before reuse may result in incorrect system behavior.
Published · Updated
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28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.4epss 0.8%
The Honeywell Experion PKS
and OneWireless WDM
contains an Integer Underflow
vulnerability
in the component Control Data Access (CDA). An attacker could potentially exploit this vulnerability, leading to a Communication Channel Manipulation, which could result in a failure during subtraction allowing 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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H
Affected products
Honeywell · C200EHoneywell · C300 PCNT02Honeywell · C300 PCNT05Honeywell · C300PMHoneywell · CN100Honeywell · FIM4Honeywell · FIM8Honeywell · HCAHoneywell · UOCHoneywell · Wireless Device ManagerRelated CVEs — Honeywell C300 PCNT02
In the same product, most dangerous first.
CVE-2025-3946HIGHIncorrect response generation during FTEB protocol processingEPSS 0.6%CVE-2025-2521HIGHLack of indexes’ validation against buffer borders leads to remote code execution.EPSS 0.5%CVE-2025-2520HIGHDereferencing of an uninitialized pointer leads to denial of service.EPSS 0.4%CVE-2025-3947HIGHInteger underflow during processing of short network packets in CDA FTEB responderEPSS 0.4%CVE-2025-2522MEDIUMLack of buffer clearing before reuse may result in incorrect system behavior.EPSS 0.3%
References
https://process.honeywell.com/