Read-only object overwrite via SDO session confusion
Published Oct 1, 2026 · Updated Oct 1, 2026
Write-protection bypass in RT-Labs AB C-Open before 1.1.1 allows attackers on a CAN bus to overwrite read-only Object Dictionary entries. The SDO server retains a pointer set during an upload and processes download-segment frames without checking that a download session is active, writing through that pointer. Exploitation requires access to the CAN bus; the demonstrated consequence is alteration of protected object values, not arbitrary code execution.
Summary
What happened
Write-protection bypass in RT-Labs AB C-Open before 1.1.1 allows attackers on a CAN bus to overwrite read-only Object Dictionary entries. The SDO server retains a pointer set during an upload and processes download-segment frames without checking that a download session is active, writing through that pointer. Exploitation requires access to the CAN bus; the demonstrated consequence is alteration of protected object values, not arbitrary code execution.
The record
- CVE
- CVE-2026-82358
- Published
- Oct 1, 2026
- Updated
- Oct 1, 2026
- Vendor
- RT-Labs AB
- Product
- C-Open
- Classifications
- T0836
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Oct 1, 2026CVE publishedPublication date reported by the CVE source.
- Oct 1, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected version>1.1.1 <*
- Affected versionversion=0 <1.1.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
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Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Activity data is delayed. The latest report is Sep 28, 2026.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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