CVE-2026-82944

Buffer Overflow in CoE SDO Upload Multi-Segment Data Transfers

Published Oct 26, 2026 CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Rt-labs Ab
Rt-labs Ab soem
Vendors & Products Rt-labs Ab
Rt-labs Ab soem
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Buffer Overflow in CoE SDO Upload Multi-Segment Data Transfers
Weaknesses CWE-120
CWE-131
CWE-787
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
ENISA
Published
Updated
Nov 2, 2026, 8:58 PM
Reserved
Aug 31, 2026, 12:26 PM
Status
Awaiting Analysis
Published
Oct 26, 2026, 9:16 AM
Modified
Nov 2, 2026, 9:17 PM