CVE-2026-3869 PUBLISHED

Assigner: schneider
Reserved: 10.03.2026 Published: 11.09.2026 Updated: 11.09.2026

CWE-303 : Incorrect Implementation of Authentication Algorithm vulnerability exists that could cause loss of confidentiality, integrity and availability of the PLC provided an application project with a lower application level is running on the PLC.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS Score: 9.2

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	Present	Availability	High	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	Schneider Electric
Product	Modicon M580
Versions	Default: unaffected Version All versions with an application level below 4.00 is affected

Vendor	Schneider Electric
Product	Modicon M580 Safety
Versions	Default: unaffected Version All versions with an application level below 4.20 is affected

References

https://download.se.com/files?p_Doc_Ref=SEVD-2026-251-04&p_enDocType=Security+and+Safety+Notice&p_File_Name=SEVD-2026-251-04.pdf

Problem Types

CWE-303 Incorrect implementation of authentication algorithm CWE