{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-124759", "assignerOrgId": "4b71179a-3b92-4a9d-b9fc-af8b8ed579ee", "state": "PUBLISHED", "assignerShortName": "rt-labs", "dateReserved": "2026-11-09T12:48:59.071Z", "datePublished": "2026-11-13T13:22:56.820Z", "dateUpdated": "2026-11-13T13:22:56.820Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "4b71179a-3b92-4a9d-b9fc-af8b8ed579ee", "shortName": "rt-labs", "dateUpdated": "2026-11-13T13:22:56.820Z"}, "title": "Alarm frames are accepted from any source address", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-346", "description": "CWE-346 Origin Validation Error", "type": "CWE"}]}], "affected": [{"vendor": "RT-Labs", "product": "P-Net", "versions": [{"status": "affected", "version": "0", "lessThan": "1.0.4", "versionType": "semver"}, {"status": "affected", "version": "1.0.4", "lessThan": "*", "versionType": "semver"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "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.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>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.</p>"}]}], "references": [{"url": "https://rt-labs.com/wp-content/uploads/2026/11/RRTL-261109-01.pdf", "name": "Cybersecurity advisory for P-Net"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "ADJACENT", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "HIGH", "baseScore": 7.1, "vectorString": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N"}}], "solutions": [{"lang": "en", "value": "Upgrade to P-Net 1.0.4 or later, which ignores alarm frames that do not come from the IO-controller of the Application Relationship. It reduces the risk but does not remove it, see Remaining Risk.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>Upgrade to P-Net 1.0.4 or later, which ignores alarm frames that do not come from the IO-controller of the Application Relationship. It reduces the risk but does not remove it, see Remaining Risk.</p>"}]}], "credits": [{"lang": "en", "value": "Aditya Gupta (Attify - attify.com)", "type": "finder"}], "source": {"discovery": "UNKNOWN"}, "workarounds": [{"lang": "en", "value": "Isolate the network of the device from untrusted hosts, for example by a firewall or a separate network,. The remaining risk is that a host on the network that knows the MAC address of the IO-controller and the alarm references can still send forged alarm frames.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>Isolate the network of the device from untrusted hosts, for example by a firewall or a separate network,. The remaining risk is that a host on the network that knows the MAC address of the IO-controller and the alarm references can still send forged alarm frames.</p>"}]}]}}}

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