CVE-2026-127123
Deferred
Deferred - Pending Action
P-Net RPC Session Fragment Endianness Handling Flaw
Vulnerability report for CVE-2026-127123, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-11-13
Last updated on: 2026-11-13
Assigner: 4b71179a-3b92-4a9d-b9fc-af8b8ed579ee
Description
Description
P-Net before 1.0.4 releases the Application Relationship of an RPC session, without the abort procedure, when a fragment of a request has another data representation (endianness) than the first fragment of the call. The application is not told that the Application Relationship is gone, the cyclic data stops, and the resources of the Application Relationship are left referencing a cleared structure. Another host can then connect in its place. A host with ADJACENT network access that has observed the activity UUID of the connection, which is sent in clear in every RPC request, can do this with one PDU.
CVSS Scores
EPSS Scores
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Meta Information
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-404 | The product does not release or incorrectly releases a resource before it is made available for re-use. |
