CVE-2024-6788Network attack vector

Unauthenticated account access via firmware password reset

Published Aug 13, 2024 · Updated Aug 22, 2025

Use of default credentials in Phoenix Contact CHARX SEC-3xxx firmware before 1.6.3 allows remote attackers to reset the user-app password. The LAN firmware-update feature restores the predefined, low-privileged user-app account to its documented default password when an upgrade runs. Unauthenticated LAN access is sufficient, and the resulting known credential grants only the limited rights assigned to user-app.

CVSS severity8.6
High
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use of default credentials in Phoenix Contact CHARX SEC-3xxx firmware before 1.6.3 allows remote attackers to reset the user-app password. The LAN firmware-update feature restores the predefined, low-privileged user-app account to its documented default password when an upgrade runs. Unauthenticated LAN access is sufficient, and the resulting known credential grants only the limited rights assigned to user-app.

The record

CVE
CVE-2024-6788
Published
Aug 13, 2024
Updated
Aug 22, 2025
Vendor
Phoenix Contact
Product
CHARX SEC-3100
Classifications
CWE-1392, T1098
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 13, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 22, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=0 <1.6.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Phoenix Contact · CHARX SEC-3100version=0 <1.6.3
Phoenix Contact · CHARX SEC-3150version=0 <1.6.3
Phoenix Contact · CHARX SEC-3050version=0 <1.6.3
Phoenix Contact · CHARX SEC-3000version=0 <1.6.3

Published CVSS scores

8.6CERT VDECVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
9.8NIST NVDCVSS:3.1/AV:N/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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1392Use of Default Credentials
T1098Account Manipulation

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

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Your stack

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