CVE-2026-124759
Alarm frames are accepted from any source address
Description
P-Net before 1.0.4 routes a received RTA alarm frame to an Application Relationship using only the destination alarm reference in the frame, without checking the source of the frame. A host with ADJACENT network access can abort an established Application Relationship with a single alarm ERROR frame, or deliver forged alarm notifications with chosen type, slot, subslot, USI and payload to the application.
INFO
Published Date :
Nov. 13, 2026, 1:22 p.m.
Last Modified :
Nov. 13, 2026, 1:22 p.m.
Remotely Exploit :
No
Source :
rt-labs
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 4.0 | HIGH | 4b71179a-3b92-4a9d-b9fc-af8b8ed579ee |
Solution
- Update P-Net to version 1.0.4 or later.
- Validate alarm frame source.
- Implement source authentication for alarm frames.
- Monitor network for anomalous alarm traffic.
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CVE-2026-124759 vulnerability anywhere in the article.