CVE-2023-5100Network attack vector

Sensitive-data disclosure via unencrypted RDT400 traffic

Published Oct 9, 2023 · Updated Sep 19, 2024

Cleartext transmission in RDT400 on SICK APU0200 before 4.0.0.6 allows remote attackers to read sensitive data from intercepted network traffic. RDT400 sends potentially sensitive information without transport encryption, exposing its contents to traffic interception. Exploitation requires remote attackers to observe device traffic generated through user interaction; the bounded impact is sensitive-data disclosure.

CVSS severity5.9
Medium
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cleartext transmission in RDT400 on SICK APU0200 before 4.0.0.6 allows remote attackers to read sensitive data from intercepted network traffic. RDT400 sends potentially sensitive information without transport encryption, exposing its contents to traffic interception. Exploitation requires remote attackers to observe device traffic generated through user interaction; the bounded impact is sensitive-data disclosure.

The record

CVE
CVE-2023-5100
Published
Oct 9, 2023
Updated
Sep 19, 2024
Vendor
SICK AG
Product
APU0200
Classifications
CWE-319, T1040
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 9, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 19, 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=all versions

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

SICK AG · APU0200version=all versions

Published CVSS scores

5.9SICK AGCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N
6.5NISTCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/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.

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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-319Cleartext Transmission of Sensitive Information
T1040Network Sniffing

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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