{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-82358",
        "assignerOrgId": "9119a7d8-5eab-497f-8521-727c672e3725",
        "state": "PUBLISHED",
        "assignerShortName": "cisa-cg",
        "dateReserved": "2026-08-28T18:10:39.170Z",
        "datePublished": "2026-10-01T19:42:16.559Z",
        "dateUpdated": "2026-10-07T15:52:15.539Z"
    },
    "containers": {
        "cna": {
            "descriptions": [
                {
                    "lang": "en",
                    "value": "RT-Labs AB C-Open CANopen contains a write protection bypass in the SDO (Service Data Object) server implementation 'src/co_sdo_server.c' that fails to properly validate write permissions when processing download-segment frames. An unauthenticated attacker on the CAN bus can initiate an SDO upload for a read-only Object Dictionary (OD) entry, which sets a data pointer to the read-only object, then send download-segment frames to write to that memory location. The download-segment handler does not verify that a download session is active, allowing any CANopen node to overwrite read-only OD entries using two SDO frames. Note that CANopen protocol operates over CAN bus and does not provide built-in authentication mechanisms. Fixed in 1.1.1."
                }
            ],
            "affected": [
                {
                    "vendor": "RT-Labs AB",
                    "product": "C-Open",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0",
                            "status": "affected",
                            "lessThan": "1.1.1",
                            "versionType": "custom"
                        },
                        {
                            "version": "1.1.1",
                            "status": "unaffected"
                        }
                    ]
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "description": "CWE-863 Incorrect Authorization",
                            "lang": "en",
                            "type": "CWE",
                            "cweId": "CWE-863"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "scope": "UNCHANGED",
                        "version": "3.1",
                        "baseScore": 6.5,
                        "attackVector": "ADJACENT_NETWORK",
                        "baseSeverity": "MEDIUM",
                        "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
                        "integrityImpact": "HIGH",
                        "userInteraction": "NONE",
                        "attackComplexity": "LOW",
                        "availabilityImpact": "NONE",
                        "privilegesRequired": "NONE",
                        "confidentialityImpact": "NONE"
                    }
                },
                {
                    "cvssV4_0": {
                        "version": "4.0",
                        "baseScore": 7.1,
                        "attackVector": "ADJACENT",
                        "baseSeverity": "HIGH",
                        "vectorString": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N",
                        "userInteraction": "NONE",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "NONE",
                        "subIntegrityImpact": "NONE",
                        "vulnIntegrityImpact": "HIGH",
                        "subAvailabilityImpact": "NONE",
                        "vulnAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "NONE",
                        "vulnConfidentialityImpact": "NONE"
                    }
                },
                {
                    "other": {
                        "type": "ssvc",
                        "content": {
                            "timestamp": "2026-08-28T18:03:52.879928Z",
                            "id": "CVE-2026-82358",
                            "options": [
                                {
                                    "Exploitation": "none"
                                },
                                {
                                    "Automatable": "no"
                                },
                                {
                                    "Technical Impact": "partial"
                                }
                            ],
                            "role": "CISA Coordinator",
                            "version": "2.0.3"
                        }
                    }
                }
            ],
            "title": "RT-Labs AB C-Open CANopen SDO Server Write Protection Bypass",
            "references": [
                {
                    "name": "url",
                    "url": "https://rt-labs.com/wp-content/uploads/2026/09/RRTL-260929-01.pdf",
                    "tags": [
                        "vendor-advisory"
                    ]
                },
                {
                    "name": "url",
                    "url": "https://github.com/rtlabs-com/c-open/releases/tag/public%2Fv1.1.1",
                    "tags": [
                        "release-notes"
                    ]
                },
                {
                    "name": "url",
                    "url": "https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2025/va-26-275-02.json",
                    "tags": [
                        "third-party-advisory"
                    ]
                },
                {
                    "name": "url",
                    "url": "https://www.cve.org/CVERecord?id=CVE-2026-82358",
                    "tags": [
                        "vdb-entry"
                    ]
                }
            ],
            "credits": [
                {
                    "value": "f0rw4rd, quellsec.dev",
                    "lang": "en"
                }
            ],
            "datePublic": "2026-09-21T00:00:00.000Z",
            "providerMetadata": {
                "orgId": "9119a7d8-5eab-497f-8521-727c672e3725",
                "shortName": "cisa-cg",
                "dateUpdated": "2026-10-01T19:42:16.559Z"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "id": "CVE-2026-82358",
                                "role": "CISA Coordinator",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "version": "2.0.3",
                                "timestamp": "2026-10-07T15:10:49.474411Z"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-10-07T15:52:15.539Z"
                }
            }
        ]
    }
}