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Status published
Medium
CVE-2025-41704
Phoenix Contact: Unauthenticated Modbus Service DoS via Crafted Function Code
Vulnerability 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.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:
- D. Blagojevic, S. Dietz, F. Koroknai, T. Weber from CyberDanube Security Research
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Affected Vendor
Phoenix Contact
View all reports →Affected Software
QUINT4-UPS/24DC/24DC/5/EIP, QUINT4-UPS/24DC/24DC/10/EIP, QUINT4-UPS/24DC/24DC/20/EIP, QUINT4-UPS/24DC/24DC/40/EIP
Vulnerable Versions:
VC:00
Timeline
Official Publish:
October 14th, 2025
Last Modified:
November 3rd, 2025
Added to House:
July 22nd, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L