RT-Labs AB C-Open up to 1.1.0 SDO Server src/co_sdo_server.c permission

CVSS Meta Temp Score
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CTI Interest Score
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5.8$0-$5k0.52-

Summaryinfo

A vulnerability was found in RT-Labs AB C-Open up to 1.1.0. It has been declared as problematic. The impacted element is an unknown function of the file src/co_sdo_server.c of the component SDO Server. The manipulation results in permission. This vulnerability is reported as CVE-2026-82358. The attack can be launched remotely. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in RT-Labs AB C-Open up to 1.1.0. It has been classified as problematic. Affected is some unknown processing of the file src/co_sdo_server.c of the component SDO Server. The manipulation with an unknown input leads to a permission vulnerability. CWE is classifying the issue as CWE-275. This is going to have an impact on integrity. CVE summarizes:

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.

The advisory is available at rt-labs.com. This vulnerability is traded as CVE-2026-82358 since 08/28/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1222 by the MITRE ATT&CK project.

Upgrading to version 1.1.1 eliminates this vulnerability.

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Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.8

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.5
CNA Vector (cisa-cg): 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Permission
CWE: CWE-275 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: C-Open 1.1.1

Timelineinfo

08/28/2026 CVE reserved
10/01/2026 +34 days Advisory disclosed
10/01/2026 +0 days VulDB entry created
10/01/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: rt-labs.com
Status: Confirmed

CVE: CVE-2026-82358 (🔒)
GCVE (CVE): GCVE-0-2026-82358
GCVE (VulDB): GCVE-100-412782

Entryinfo

Created: 10/01/2026 21:59
Changes: 10/01/2026 21:59 (76)
Complete: 🔍
Cache ID: 216::103

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