Memory Corruption Vulnerability in SOEM Software by RT-Labs
CVE-2026-70388

8.3HIGH

Key Information:

Vendor

Rt-labs Ab

Status
Soem
Vendor
CVE Published:
26 October 2026

What is CVE-2026-70388?

The SOEM software by RT-Labs, specifically version 2.0.0 and earlier, is affected by a serious vulnerability that allows a malicious device on the same network to craft specially formed messages. This flaw derives from inadequate validation of arithmetic operations on message length, enabling the software to handle negative or excessively large values incorrectly. Consequently, this can lead to data being written outside allocated memory boundaries, which may corrupt memory and open the door to arbitrary code execution on the master system. Organizations using this software are strongly encouraged to implement security measures to mitigate potential threats.

Affected Version(s)

SOEM 0 < 2.0.1

References

https://rt-labs.com/wp-content/uploads/2026/10/RRTL-26092...
vendor-advisory

CVSS V3.1

Score:
8.3
Severity:
HIGH
Confidentiality:
Low
Integrity:
High
Availability:
Low
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

alosafuzz, 3ntr0py1337 / LeetProtect Research, Brian Willows / graith.co.uk, Eun0us / EspilonOrg, Mayur Agnihotri
.