CVE-2026-82944
Buffer Overflow in CoE SDO Upload Multi-Segment Data Transfers
SOEM version 2.0.0 and earlier contains a vulnerability in multi-segment data transfers where a malicious device can overflow memory buffers. The software checks the total size only once at the beginning, but doesn't track the cumulative size as multiple segments arrive. An attacker can declare a small initial size to pass validation, then send additional segments that exceed the allocated buffer. This allows the attacker to write controlled data beyond buffer boundaries, potentially enabling code execution.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| SOEM RT-Labs AB |
≥ 0; < 2.0.1 (affected, semver)
Other versions: unaffected |
CNA: ENISA |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 8.8 high |
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | CNA: ENISA |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://rt-labs.com/wp-content/uploads/2026/10/RRTL-260921-01.pdfCNA: ENISA · vendor-advisory
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