CVEvulnerability

CVE-2026-7422

7.1 HIGH Published 2026-04-29 Modified 2026-10-26 Official page ↗
Status
Analyzed
Published
2026-04-29
Last modified
2026-10-26
Assigner
ff89ba41-3aa1-4d27-914a-91399e9639e5
CVSS 4.0 (ff89ba41-3aa1-4d27-914a-91399e9639e5)
7.1 HIGH — CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1 (ff89ba41-3aa1-4d27-914a-91399e9639e5)
6.5 MEDIUM — CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Weaknesses
CWE-290

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.

Affected configurations

• amazon freertos-plus-tcp (>= 4.0.0 < 4.2.6) • amazon freertos-plus-tcp (>= 4.3.0 < 4.4.1)

Related

Weakness · CWE (1)

  • CWE-290 Authentication Bypass by Spoofing weakness

References