VULNERABILITY INTELLIGENCE

CVE-2026-7422

CVSS score6.5 MEDIUM
EPSS probability0.18%
CISA KEVNot currently listed
Published2026-04-29
Last modified2026-10-26
CVSS vectorCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

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.

Weakness classification

  • ff89ba41-3aa1-4d27-914a-91399e9639e5: CWE-290

Primary references