Vulnerability · Published Oct 3, 2025 · Assigned by VulnCheck
CVE-2025-34226OpenPLC Runtime v3 Persistent DoS
High 7.1
In plain English
A high-severity improper input validation in OpenPLC Runtime from Autonomy Logic. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 52% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
Official description
OpenPLC Runtime v3 contains an input validation flaw in the /upload-program-action endpoint: the epoch_time field supplied during program uploads is not validated and can be crafted to induce corruption of the programs database. After a successful malformed upload the runtime continues to operate until a restart; on restart the runtime can fail to start because of corrupted database entries, resulting in persistent denial of service requiring complete rebase of the product to recover. This vulnerability was remediated by commit 095ee09.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Autonomy Logic | OpenPLC Runtime | 3.0 – before 095ee09623dd229b64ad3a1db38a901a3772f6fc |
Weakness: CWE-664, CWE-20 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
References
- https://autonomylogic.com/ product
- https://openplc.discussion.community/post/persistant-dos-affecting-openplc-runtime-13722844 issue-tracking
- https://github.com/thiagoralves/OpenPLC_v3/pull/297/commits/095ee09623dd229b64ad3a1db38a901a3772f6fc issue-tracking
- https://www.vulncheck.com/advisories/openplc-runtime-v3-persistent-denial-of-service third-party-advisory