CVE-2026-70388

High

Description

SOEM version 2.0.0 and earlier contains vulnerabilities where a malicious device on the network can send specially crafted messages that cause the master to write data outside allocated memory boundaries. The software performs arithmetic on message length values without proper validation, allowing negative or extremely large values to bypass safety checks. This can corrupt memory and potentially allow an attacker to execute arbitrary code on the master system.

SeverityHigh

CVSS8.3

Exploit probability—

ProductSOEM

PublishedOct 26, 2026

First seenOct 26, 2026

Weakness typeCWE-191CWE-191 CWE-195CWE-195 CWE-787Out-of-bounds write

How to fix

Update

RT-Labs AB SOEM2.0.1 or later

Vendor advisories

rt-labs.com/wp-content/uploads/2026/10/RRTL-260921-01.pdf

Affected products

Product	Affected versions	Fixed in
RT-Labs AB SOEM	v < 2.0.1	2.0.1

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