CVE-2026-7422

MediumCVSS 6.5/10Last modified Jun 17, 2026

Description

Insufficient packet validation in FreeRTOS-Plus-TCP before V4.2.6 and V4.4.1 allows an adjacent network actor to bypass all checksum and minimum-size validation by spoofing the Ethernet source MAC address to match one of the device's own registered endpoints, because the loopback detection mechanism skips all input validation for packets whose source MAC matches a local endpoint.

To mitigate this issue, users should upgrade to the fixed version when available.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Weakness enumeration

CWE-290

Affected software

No affected versions have been published.

Timeline

Published: Apr 29, 2026
Last modified: Jun 17, 2026
NVD status: Analyzed

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