CVE-2022-24043Network attack vector

Username enumeration via nonuniform login response timing

Published May 10, 2022 · Updated Aug 3, 2024

Observable discrepancy in Siemens Desigo DXR2, PXC3, PXC4, and PXC5 allows remote attackers to identify valid usernames. The login handler responds at different speeds for correct and incorrect usernames because it does not normalize failed-attempt timing. No authentication or user interaction is required; the side channel discloses account names but does not disclose passwords or grant access.

CVSS severity5.3
Medium
EPSS probability1.07%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Observable discrepancy in Siemens Desigo DXR2, PXC3, PXC4, and PXC5 allows remote attackers to identify valid usernames. The login handler responds at different speeds for correct and incorrect usernames because it does not normalize failed-attempt timing. No authentication or user interaction is required; the side channel discloses account names but does not disclose passwords or grant access.

The record

CVE
CVE-2022-24043
Published
May 10, 2022
Updated
Aug 3, 2024
Vendor
Siemens
Product
Desigo PXC5
Classifications
CWE-203, T1589
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 10, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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 < V02.20.142.10-10884

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Siemens · Desigo PXC5version=All versions < V02.20.142.10-10884
Siemens · Desigo PXC3version=All versions < V01.21.142.4-18
Siemens · Desigo PXC4version=All versions < V02.20.142.10-10884
Siemens · Desigo DXR2version=All versions < V01.21.142.5-22

Published CVSS scores

5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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.

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-203Observable Discrepancy
T1589Gather Victim Identity Information

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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