CVE-2026-35226

EUVD-2026-50166
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
CERTVDECNA
6.5 MEDIUM
ADJACENT_NETWORK
LOW
NONE
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 6%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
codesysprofinet
4.4.0.0 ≤
𝑥
< 4.8.0.0
CNA
Common Weakness Enumeration
Vulnerability Media Exposure
References
https://www.certvde.com/en/advisories/VDE-2026-041/