Medium · CVSS 6.5CVE-2026-82943

Out-of-Bounds Read via Unchecked Length ValuesCVE-2026-82943

Answer in brief

CVE-2026-82943 records a Medium severity (CVSS 6.5) vulnerability in Out-of-Bounds Read via Unchecked Length Values. The current sources do not mark it as known exploited. The current feed maps RT-Labs AB/SOEM (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 26, 2026Updated Oct 26, 2026Source checked Oct 26, 2026First seen by HOL Oct 26, 2026Material review Oct 26, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 6.5
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 6.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps RT-Labs AB/SOEM (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
RT-Labs AB/SOEMgeneric	>=0 <2.0.1	2.0.1

Recommended response

Check inventory. Check lockfiles and deployed manifests for RT-Labs AB/SOEM.
Review the reported fix. Update RT-Labs AB/SOEM to 2.0.1 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Oct 26, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 26, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 26, 2026

Sources and claim methodology

Source referencert-labs.com

Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.