CVE-2026-102552: Freertos Freertos-Plus-TCP

Medium severity, CVSS 5.9. EPSS: 0.2% chance of exploitation in the next 30 days.

Improper verification of the source of a communication channel in the DNS resolver in Amazon FreeRTOS-Plus-TCP before V4.4.2 might allow remote third-party to insert a chosen address into the device's DNS cache via a forged DNS reply. To remediate this issue, users should upgrade to version V4.4.2 and enable ipconfigDNS_CHECK_REPLY_SOURCE_IP.

Affected products

• Freertos Freertos-Plus-TCP: up to and including 4.4.1

Published 2026-10-16. Last modified 2026-10-16.