CVE-2026-70388
SOEM: Memory Corruption via Integer Underflow in Message Length Validation
RT-Labs AB SOEM
CVSS
8.3HighExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)No scoreNo FIRST EPSS score in this snapshot yet
What fixes it
- 2.0.1SOEMCVE List
A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.
Reports 1
1 outlet mention it. Reports are not confirmation; each links to its source.
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.
Text from CVE List
Affected versions 1
- SOEMaffected: all versions before 2.0.1CVE List