CVE-2025-3947 Integer underflow during processing of short network packets in CDA FTEB responder
An integer underflow in the CDA responder allows attackers to cause a denial of service by sending short network packets.
- 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-2025-3947?
CVE-2025-3947 is a high-severity 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 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.
Weakness: CWE-191
Which versions are affected by CVE-2025-3947?
How do I fix CVE-2025-3947?
No fix has been published for CVE-2025-3947 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-3947 being exploited?
There is no known exploitation of CVE-2025-3947 in the wild and no public exploit code.
Sources
Also known as GHSA-96x3-56x6-r6f5.