Vulnerability · Published Oct 26, 2026 · Assigned by ENISA
CVE-2026-82945Memory Corruption via FMMU Configuration Table Overflow
Medium 6.5
In plain English
A medium-severity out-of-bounds write in SOEM from RT-Labs AB. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 6% of all known vulnerabilities).
Official description
SOEM version 2.0.0 and earlier contains a vulnerability during device configuration where a malicious device can cause memory corruption. The software writes configuration data to a fixed-size array without checking if the array index exceeds its maximum size of EC_MAXFMMU entries. A device presenting more than EC_MAXFMMU configuration blocks can force writes beyond the array boundary, corrupting adjacent memory structures and potentially disrupting subsequent operations.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| RT-Labs AB | SOEM | 0 – before 2.0.1 |
Weakness: CWE-787, CWE-129, CWE-120 · Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H