CVE-2024-28747Network attack vector

High-privilege configuration access via hard-coded credentials

Published Jul 9, 2024 · Updated Aug 2, 2024

Hard-coded credentials in ifm SmartPLC AC14xx and AC4xxS firmware 4.3.17 and earlier allow remote attackers to access device configuration. A configuration endpoint accepts credentials embedded in the firmware and exposes scripts capable of executing various commands. Network reachability is sufficient to attempt access, and successful authentication grants high privileges over the controller and its configuration.

CVSS severity9.8
Critical
EPSS probability0.65%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Hard-coded credentials in ifm SmartPLC AC14xx and AC4xxS firmware 4.3.17 and earlier allow remote attackers to access device configuration. A configuration endpoint accepts credentials embedded in the firmware and exposes scripts capable of executing various commands. Network reachability is sufficient to attempt access, and successful authentication grants high privileges over the controller and its configuration.

The record

CVE
CVE-2024-28747
Published
Jul 9, 2024
Updated
Aug 2, 2024
Vendor
ifm electronic GmbH
Product
SmartPLC AC14xx Firmware
Classifications
CWE-798, T1078.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 9, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record 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 <=4.3.17
  2. Affected versionversion=0 <=V4.3.17

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ifm electronic GmbH · SmartPLC AC14xx Firmwareversion=0 <=4.3.17; version=0 <=V4.3.17
ifm electronic GmbH · SmartPLC AC4xxS Firmwareversion=0 <=4.3.17; version=0 <=V4.3.17

Published CVSS scores

9.8CERT VDECVSS: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-798Use of Hard-coded Credentials
T1078.001Default Accounts

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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