Buffer overflow in Codesys Profinet
CVE-2026-35226
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…
Vulnerability class: Buffer Overflow
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Codesys Profinet — versions 4.4.0.0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-35226?
- CVE-2026-35226 is a medium-severity vulnerability in Codesys Profinet, classified under Out-of-bounds Write. CVSS score: 6.5/10. Published 2026-07-29.
- How severe is CVE-2026-35226?
- Medium severity. CVSS v3 base score is 6.5 out of 10.