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.
                
            References
                    | Link | Resource | 
|---|---|
| https://process.honeywell.com/ | 
Configurations
                    No configuration.
History
                    15 Jul 2025, 13:14
| Type | Values Removed | Values Added | 
|---|---|---|
| Summary | 
        
        
  | 
10 Jul 2025, 21:15
| Type | Values Removed | Values Added | 
|---|---|---|
| New CVE | 
Information
                Published : 2025-07-10 21:15
Updated : 2025-07-15 13:14
NVD link : CVE-2025-3947
Mitre link : CVE-2025-3947
CVE.ORG link : CVE-2025-3947
JSON object : View
Products Affected
                No product.
CWE
                
                    
                        
                        CWE-191
                        
            Integer Underflow (Wrap or Wraparound)
