CVE-2026-35226

Out-of-bounds Write in CODESYS PROFINET Controller

Published Jul 29, 2026 CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Codesys profinet
Vendors & Products Codesys profinet
Type Values Removed Values Added
Description 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.
Title Out-of-bounds Write in CODESYS PROFINET Controller
First Time appeared Codesys
Codesys codesys Profinet
Weaknesses CWE-787
CPEs cpe:2.3:a:codesys:codesys_profinet:*:*:*:*:*:*:*:*
Vendors & Products Codesys
Codesys codesys Profinet
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 7.1, 'vector': 'CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
CERTVDE
Published
Updated
Jul 29, 2026, 2:27 PM
Reserved
Apr 1, 2026, 7:54 PM
Status
Deferred
Published
Jul 29, 2026, 8:16 AM
Modified
Oct 23, 2026, 11:10 PM