---
id: CVE-2026-82943
title: Out-of-Bounds Read via Unchecked Length Values
summary: >-
  SOEM version 2.0.0 and earlier contains vulnerabilities where a malicious
  device can send messages that cause the master to read data from memory
  locations beyond the intended buffer. The software uses length values from
  device responses…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'
cvssSource: cna
cwe:
  - CWE-125
  - CWE-195
  - CWE-200
vendor: RT-Labs AB
product: SOEM
affected:
  - SOEM < 2.0.1
published: '2026-10-26'
updated: '2026-10-26'
sourceUpdated: '2026-10-26T08:41:26.457Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-82943'
references:
  - url: 'https://rt-labs.com/wp-content/uploads/2026/10/RRTL-260921-01.pdf'
tags:
  - cve.org
ingestedAt: '2026-10-26T09:22:35.523Z'
---

## Overview

SOEM version 2.0.0 and earlier contains vulnerabilities where a malicious device can send messages that cause the master to read data from memory locations beyond the intended buffer. The software uses length values from device responses without validating them against actual buffer sizes. An attacker can exploit this to extract up to 64KB of data from the master's memory.

## Affected

- `SOEM < 2.0.1`

## Remediation

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