---
id: CVE-2026-82944
title: Buffer Overflow in CoE SDO Upload Multi-Segment Data Transfers
summary: >-
  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…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-787
  - CWE-131
  - CWE-120
vendor: RT-Labs AB
product: SOEM
affected:
  - SOEM < 2.0.1
published: '2026-10-26'
updated: '2026-10-26'
sourceUpdated: '2026-10-26T08:47:50.412Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-82944'
references:
  - url: 'https://rt-labs.com/wp-content/uploads/2026/10/RRTL-260921-01.pdf'
tags:
  - cve.org
ingestedAt: '2026-10-26T09:22:35.522Z'
---

## Overview

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.

## Affected

- `SOEM < 2.0.1`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.