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CVE-2025-41704

Phoenix Contact: Unauthenticated Modbus Service DoS via Crafted Function Code

MEDIUM
5.3
CVSS Score
Published: October 14, 2025 at 08:05 AM UTC
Updated: October 18, 2026 at 09:10 PM UTC
4 products affected across 1 vendorQUINT4-UPS/24DC/24DC/10/EIPQUINT4-UPS/24DC/24DC/5/EIPQUINT4-UPS/24DC/24DC/40/EIP

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Severity
MEDIUM5.3
Exploit prediction
EPSS 2%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

QUINT4-UPS/24DC/24DC/10/EIP· Phoenix Contact
90%
VC:00 ≤ v < VC:07VC:0VC:00
Affected range stops below VC:07, so it looks safe — our inference, not a vendor statement
QUINT4-UPS/24DC/24DC/20/EIP· Phoenix Contact
90%
VC:00 ≤ v < VC:07VC:0VC:00
Affected range stops below VC:07, so it looks safe — our inference, not a vendor statement
QUINT4-UPS/24DC/24DC/40/EIP· Phoenix Contact
90%
VC:00 ≤ v < VC:07VC:0VC:00
Affected range stops below VC:07, so it looks safe — our inference, not a vendor statement
QUINT4-UPS/24DC/24DC/5/EIP· Phoenix Contact
90%
VC:00 ≤ v < VC:07VC:0VC:00
Affected range stops below VC:07, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

Source: [email protected]
https://certvde.com/de/advisories/VDE-2025-072
Source: af854a3a-2127-422b-91ae-364da2661108
http://seclists.org/fulldisclosure/2025/Oct/12

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMCERTVDE
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-770

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