CVE-2025-2523 Lack of buffer clearing before reuse may result in incorrect system behavior.
An integer underflow in Honeywell Experion PKS and OneWireless allows remote attackers to manipulate communication channels and execute arbitrary code.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-2523?
CVE-2025-2523 is a critical vulnerability in Honeywell C200E, published on 10 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-191
Which versions are affected by CVE-2025-2523?
How do I fix CVE-2025-2523?
No fix has been published for CVE-2025-2523 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-2523 being exploited?
There is no known exploitation of CVE-2025-2523 in the wild and no public exploit code.
Sources
Also known as GHSA-pq3m-8f73-633p.