CVE-2023-5405Network attack vector

Process-memory disclosure via crafted CDA error response

Published Apr 17, 2024 · Updated Feb 6, 2025

Information disclosure in Honeywell Experion Server allows remote attackers to read CDA Server process memory via a crafted message. The CDA Server error path includes process-memory contents when generating a response to the specially crafted message. No authentication or user interaction is required, but exploitation has high complexity and the documented consequence is limited to confidentiality loss.

CVSS severity5.9
Medium
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Honeywell Experion Server allows remote attackers to read CDA Server process memory via a crafted message. The CDA Server error path includes process-memory contents when generating a response to the specially crafted message. No authentication or user interaction is required, but exploitation has high complexity and the documented consequence is limited to confidentiality loss.

The record

CVE
CVE-2023-5405
Published
Apr 17, 2024
Updated
Feb 6, 2025
Vendor
Honeywell Technologies
Product
Experion Server
Classifications
CWE-787, CAPEC-100, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 17, 2024CVE publishedPublication date reported by the CVE source.
  2. Feb 6, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=510.1 <=510.2 HF13 changes=[{"at":"510.2 HF14","status":"unaffected"}]
  2. Affected versionversion=511.1 <=511.5 TCU4 HF3 changes=[{"at":"511.5 TCU4 HF4","status":"unaffected"}]
  3. Affected versionversion=520.1 <=520.1 TCU4 changes=[{"at":"520.1 TCU5","status":"unaffected"}]
  4. Affected versionversion=520.2 <=520.2 TCU4 changes=[{"at":"520.2 TCU4 HF1","status":"unaffected"}]
  5. Affected versionversion=520.2 <=520.2 TCU4 changes=[{"at":"520.2 TCU4 HF2","status":"unaffected"}]
  6. Affected versionversion=520.2 TCU4 HFR2 <=511.5 TCU4 HF3 changes=[{"at":"511.5 TCU4 HF4","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Honeywell Technologies · Experion Serverversion=510.1 <=510.2 HF13 changes=[{"at":"510.2 HF14","status":"unaffected"}]; version=511.1 <=511.5 TCU4 HF3 changes=[{"at":"511.5 TCU4 HF4","status":"unaffected"}]; version=520.1 <=520.1 TCU4 changes=[{"at":"520.1 TCU5","status":"unaffected"}]; version=520.2 <=520.2 TCU4 changes=[{"at":"520.2 TCU4 HF1","status":"unaffected"}]; version=520.2 <=520.2 TCU4 changes=[{"at":"520.2 TCU4 HF2","status":"unaffected"}]; version=520.2 TCU4 HFR2 <=511.5 TCU4 HF3 changes=[{"at":"511.5 TCU4 HF4","status":"unaffected"}]

Published CVSS scores

5.9Honeywell International Inc.CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
5.9CISA-ADPCVSS:3.1/AV:N/AC:H/PR:N/UI:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CAPEC-100Overflow Buffers
T1210Exploitation of Remote Services

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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