CVE-2024-25994Network attack vector

Arbitrary file creation via unvalidated script upload

Published Mar 12, 2024 · Updated Jan 24, 2025

Unrestricted file upload in Phoenix Contact CHARX SEC-3xxx firmware 1.5.0 and earlier allows remote attackers to create arbitrary files. The CharxUpdateAgent service listens on TCP port 9999 by default and fails to validate user-supplied data before accepting a script upload to a fixed, write-only destination. No authentication is required, but this flaw alone provides file creation with limited integrity impact; device takeover requires chaining with other vulnerabilities.

CVSS severity5.3
Medium
EPSS probability0.73%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in Phoenix Contact CHARX SEC-3xxx firmware 1.5.0 and earlier allows remote attackers to create arbitrary files. The CharxUpdateAgent service listens on TCP port 9999 by default and fails to validate user-supplied data before accepting a script upload to a fixed, write-only destination. No authentication is required, but this flaw alone provides file creation with limited integrity impact; device takeover requires chaining with other vulnerabilities.

The record

CVE
CVE-2024-25994
Published
Mar 12, 2024
Updated
Jan 24, 2025
Vendor
Phoenix Contact
Product
CHARX SEC-3100
Classifications
CWE-434, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 12, 2024CVE publishedPublication date reported by the CVE source.
  2. Jan 24, 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 <=1.5.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Phoenix Contact · CHARX SEC-3100version=0 <=1.5.0
Phoenix Contact · CHARX SEC-3150version=0 <=1.5.0
Phoenix Contact · CHARX SEC-3050version=0 <=1.5.0
Phoenix Contact · CHARX SEC-3000version=0 <=1.5.0

Published CVSS scores

5.3CERT@VDECVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

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 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-434Unrestricted Upload of File with Dangerous Type
T1190Exploit Public-Facing Application

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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