CVE Catalog

CVE-2026-35226

MediumCVSS 6.5
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.28%

20th percentile - higher than 20% of all known CVEs

Summary

An out-of-bounds write vulnerability in the CODESYS PROFINET Controller allows an unauthenticated attacker on the same network segment to send malformed PROFINET communication data, triggering an exception in the affected PLC application. The exception is handled by the CODESYS Control runtime and results in a controlled stop of the PLC application.

Risk Assessment

The attack can halt industrial processes controlled by the PLC, leading to production downtime and potential financial losses.

Recommendation

Update the CODESYS software to a version containing the fix and consider segmenting the PROFINET network to limit access.

Related vulnerabilities

Original NVD description (English source)

An out‑of‑bounds write vulnerability in the CODESYS PROFINET Controller allows an unauthenticated attacker on the same network segment to send malformed PROFINET communication data that triggers an exception in the affected PLC application. The exception is handled by the CODESYS Control runtime system and results in a controlled stop of the PLC application.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS