{"id":"CVE-2026-82358","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-82358","generatedAt":"2026-10-28T06:35:57.970Z","title":"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.","description":"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.","published":"2026-10-01T20:17:33.000Z","lastModified":"2026-10-07T16:19:07.000Z","status":"Deferred","sourceIdentifier":"9119a7d8-5eab-497f-8521-727c672e3725","cvss":{"version":"4.0","score":7.1,"severity":"HIGH","vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-863"],"affected":[],"epss":{"score":0.00237,"percentile":0.14664,"date":"2026-10-27","history":[{"date":"2026-10-02","score":0.00237,"percentile":0.13375}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.24%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-01T20:17:33.000Z","detail":{"score":"7.1","severity":"HIGH","publishedAt":"2026-10-01T20:17:32.540Z"},"summary":"New CVE, high severity (CVSS 7.1)."}],"references":[{"url":"https://github.com/rtlabs-com/c-open/releases/tag/public%2Fv1.1.1","source":"9119a7d8-5eab-497f-8521-727c672e3725"},{"url":"https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2025/va-26-275-02.json","source":"9119a7d8-5eab-497f-8521-727c672e3725"},{"url":"https://rt-labs.com/wp-content/uploads/2026/09/RRTL-260929-01.pdf","source":"9119a7d8-5eab-497f-8521-727c672e3725"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-82358","source":"9119a7d8-5eab-497f-8521-727c672e3725"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-82358","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}