Vulnerability · Published Oct 14, 2025 · Assigned by CERTVDE
CVE-2025-41704Phoenix Contact: Unauthenticated Modbus Service DoS via Crafted Function Code
Medium 5.3
In plain English
A medium-severity resource allocation without limits in QUINT4-UPS/24DC/24DC/10/EIP from Phoenix Contact. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.6% (higher than 76% of all known vulnerabilities).
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)1.6%top 24.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
An unauthanticated remote attacker can perform a DoS of the Modbus service by sending a specific function and sub-function code without affecting the core functionality.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Phoenix Contact | QUINT4-UPS/24DC/24DC/5/EIP | VC:00 – before VC:07 |
| Phoenix Contact | QUINT4-UPS/24DC/24DC/10/EIP | VC:00 – before VC:07 |
| Phoenix Contact | QUINT4-UPS/24DC/24DC/20/EIP | VC:00 – before VC:07 |
| Phoenix Contact | QUINT4-UPS/24DC/24DC/40/EIP | VC:00 – before VC:07 |
Weakness: CWE-770 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L