CVE-2025-34226Network attack vector

Persistent denial of service via unchecked upload timestamp

Published Oct 3, 2025 · Updated Oct 3, 2025

Improper input validation in OpenPLC Runtime 3.0 allows remote authenticated users to prevent restart via a malformed program upload. The /upload-program-action handler accepts epoch_time without integer or range validation and stores the value in the programs database, permitting corrupt entries. A valid low-privilege session and successful upload are required; the corrupted database can keep the runtime from starting after its next restart.

CVSS severity7.1
High
EPSS probability0.66%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Improper input validation in OpenPLC Runtime 3.0 allows remote authenticated users to prevent restart via a malformed program upload. The /upload-program-action handler accepts epoch_time without integer or range validation and stores the value in the programs database, permitting corrupt entries. A valid low-privilege session and successful upload are required; the corrupted database can keep the runtime from starting after its next restart.

The record

CVE
CVE-2025-34226
Published
Oct 3, 2025
Updated
Oct 3, 2025
Vendor
Autonomy Logic
Product
OpenPLC Runtime
Classifications
CWE-20, CWE-664, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 3, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 3, 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=3.0 <commit 095ee09623dd229b64ad3a1db38a901a3772f6fc

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Autonomy Logic · OpenPLC Runtimeversion=3.0 <commit 095ee09623dd229b64ad3a1db38a901a3772f6fc

Published CVSS scores

7.1VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA: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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
CWE-664Improper Control of a Resource Through its Lifetime
T1499Endpoint Denial 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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo