CVE-2024-39590Public exploitNetwork attack vector

Runtime crash via truncated response pointers

Published Sep 18, 2024 · Updated Nov 4, 2025

Invalid pointer dereference in OpenPLC Runtime v3 16bf8bac1a36d95b73e7b8722d0edb8b9c5bb56a allows remote attackers to crash via EtherNet/IP requests. Protected_Logical_Write_Reply truncates three response-field pointers to 32 bits before memmove dereferences them, producing invalid addresses on 64-bit systems. Repeated unauthenticated function-code 0xAA or 0xAB requests can terminate the PLC runtime and interrupt its control service without disclosing or modifying data.

CVSS severity7.5
High
EPSS probability1.02%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Invalid pointer dereference in OpenPLC Runtime v3 16bf8bac1a36d95b73e7b8722d0edb8b9c5bb56a allows remote attackers to crash via EtherNet/IP requests. Protected_Logical_Write_Reply truncates three response-field pointers to 32 bits before memmove dereferences them, producing invalid addresses on 64-bit systems. Repeated unauthenticated function-code 0xAA or 0xAB requests can terminate the PLC runtime and interrupt its control service without disclosing or modifying data.

The record

CVE
CVE-2024-39590
Published
Sep 18, 2024
Updated
Nov 4, 2025
Vendor
OpenPLC Project
Product
OpenPLC Runtime v3
Classifications
CWE-704, T0814
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 18, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 4, 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=16bf8bac1a36d95b73e7b8722d0edb8b9c5bb56a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OpenPLC Project · OpenPLC Runtime v3version=16bf8bac1a36d95b73e7b8722d0edb8b9c5bb56a

Published CVSS scores

7.5Cisco TalosCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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.

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 exploitPublished

Weakness, pattern, technique

CWE-704Incorrect Type Conversion or Cast
T0814Denial of Service

Public exploit references

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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