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CVE-2026-3869

Modicon M580 · Vulnerability

CVSS 4.0 9.2 CRITICALCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-3869

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-3869

Published

Modicon M580

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Schneider Electric",
                    "product": "Modicon M580",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "All versions with an application level below 4.00"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }

Modicon M580 Safety

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Schneider Electric",
                    "product": "Modicon M580 Safety",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "All versions with an application level below 4.20"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }

Original source record · Cite this exact observation · Complete original publisher JSON