CVE-2025-46613Network attack vector

Unauthenticated service crash via stack argument race

Published Apr 25, 2025 · Updated Apr 25, 2025

Memory corruption in OpenPLC Runtime 3 through 64f9c11 allows remote attackers to crash the service via rapid TCP sessions. server.cpp passes a stack-allocated argument array to detached handleConnections threads, which can read it after the parent frame is reused or unavailable. Default listeners on ports 502 and 44818 expose the race without authentication, causing invalid reads, corrupted connection state, or a process crash.

CVSS severity7.5
High
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in OpenPLC Runtime 3 through 64f9c11 allows remote attackers to crash the service via rapid TCP sessions. server.cpp passes a stack-allocated argument array to detached handleConnections threads, which can read it after the parent frame is reused or unavailable. Default listeners on ports 502 and 44818 expose the race without authentication, causing invalid reads, corrupted connection state, or a process crash.

The record

CVE
CVE-2025-46613
Published
Apr 25, 2025
Updated
Apr 25, 2025
Vendor
OpenPLC Project
Product
OpenPLC
Classifications
CWE-362, T0814
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 25, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 25, 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=0 <=64f9c11263229b019091e3c5a1896c184e0661a6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OpenPLC Project · OpenPLCversion=0 <=64f9c11263229b019091e3c5a1896c184e0661a6

Published CVSS scores

7.5MITRECVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/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 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-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
T0814Denial of Service

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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