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Buffer Overflow in CoE SDO Upload Multi-Segment Data Transfers

Type: advisorySources: Official CVE List

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.

Products
SOEM
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-82944
Confirmed fixed CVEs
Not specified
Updated in this feed
29 Oct 2026, 21:33 UTC · Revision 1

Source evidence

Buffer Overflow in CoE SDO Upload Multi-Segment Data Transfers

core-cve · Original source

Published 26 Oct 2026, 08:47 UTC

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.

cve:CVE-2026-82944

SOEM

Fixed versions: Not specified

Complete source record
{
  "id": "95a4fa641c71feabbf6a1d16966b66c8e1df04bc51c648e36e9c9e340fa609b6",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-82944",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Buffer Overflow in CoE SDO Upload Multi-Segment Data Transfers",
    "summary": "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.",
    "evidence": "cve:CVE-2026-82944",
    "products": [
      {
        "name": {
          "value": "SOEM",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-82944",
      "aliases": [
        "CVE-2026-82944"
      ],
      "metrics": [
        {
          "format": "CVSS",
          "cvssV3_1": {
            "scope": "UNCHANGED",
            "version": "3.1",
            "baseScore": 8.8,
            "attackVector": "ADJACENT_NETWORK",
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "integrityImpact": "HIGH",
            "userInteraction": "NONE",
            "attackComplexity": "LOW",
            "availabilityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "confidentialityImpact": "HIGH"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "affected": [
        {
          "vendor": "RT-Labs AB",
          "product": "SOEM",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "2.0.1",
              "versionType": "semver"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ],
      "modified": "2026-10-26T08:47:50.412Z",
      "provider": "cve",
      "references": [
        "https://rt-labs.com/wp-content/uploads/2026/10/RRTL-260921-01.pdf"
      ],
      "provider_metadata": {
        "cna": {
          "orgId": "a6d3dc9e-0591-4a13-bce7-0f5b31ff6158",
          "shortName": "ENISA",
          "dateUpdated": "2026-10-26T08:47:50.412Z"
        }
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-82944",
        "evidence": "/cveMetadata/cveId"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/containers/cna/metrics"
  },
  "source_id": "core-cve",
  "document_id": 273359,
  "published_at": "2026-10-26T08:47:50.412+00:00"
}