Vulnerability · Published Oct 26, 2026 · Assigned by ENISA
CVE-2026-82944Buffer Overflow in CoE SDO Upload Multi-Segment Data Transfers
High 8.8
In plain English
A high-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 11% of all known vulnerabilities).
Official description
SOEM version 2.0.0 and earlier contains a vulnerability in multi-segment data transfers where a malicious device can overflow memory buffers. The software checks the total size only once at the beginning, but doesn't track the cumulative size as multiple segments arrive. An attacker can declare a small initial size to pass validation, then send additional segments that exceed the allocated buffer. This allows the attacker to write controlled data beyond buffer boundaries, potentially enabling code execution.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| RT-Labs AB | SOEM | 0 – before 2.0.1 |
Weakness: CWE-787, CWE-131, CWE-120 · Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H