CVE-2025-25271

Unauthenticated OCPP backend reconfiguration via insecure defaults

Published Jul 8, 2025 · Updated Jul 22, 2025

Authentication bypass in Phoenix Contact CHARX SEC-3xxx firmware before 1.7.3 allows remote attackers to configure a new OCPP backend. The OCPP service's configuration interface uses insecure authentication defaults and accepts backend-setting changes without authentication. An attacker must reach the device from an adjacent network, and successful exploitation redirects its OCPP communications to an unauthorized backend.

CVSS severity8.8
High
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Authentication bypass in Phoenix Contact CHARX SEC-3xxx firmware before 1.7.3 allows remote attackers to configure a new OCPP backend. The OCPP service's configuration interface uses insecure authentication defaults and accepts backend-setting changes without authentication. An attacker must reach the device from an adjacent network, and successful exploitation redirects its OCPP communications to an unauthorized backend.

The record

CVE
CVE-2025-25271
Published
Jul 8, 2025
Updated
Jul 22, 2025
Vendor
Phoenix Contact
Product
CHARX SEC-3100
Classifications
CWE-1188, T0866
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 8, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 22, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.0.0 <1.7.3

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Phoenix Contact · CHARX SEC-3100version=0.0.0 <1.7.3
Phoenix Contact · CHARX SEC-3150version=0.0.0 <1.7.3
Phoenix Contact · CHARX SEC-3050version=0.0.0 <1.7.3
Phoenix Contact · CHARX SEC-3000version=0.0.0 <1.7.3

Published CVSS scores

8.8CERT VDECVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1188Initialization of a Resource with an Insecure Default
T0866Exploitation of Remote Services

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo