CVE-2018-16526: Amazon Web Services Freertos

High severity, CVSS 8.1. EPSS: 4.4% chance of exploitation in the next 30 days.

Amazon Web Services (AWS) FreeRTOS through 1.3.1, FreeRTOS up to V10.0.1 (with FreeRTOS+TCP), and WITTENSTEIN WHIS Connect middleware TCP/IP component allow remote attackers to leak information or execute arbitrary code because of a Buffer Overflow during generation of a protocol checksum in usGenerateProtocolChecksum and prvProcessIPPacket.

Affected products

• Amazon Amazon Web Services Freertos: up to and including 1.3.1
• Amazon Freertos: up to and including 10.0.1

Published 2018-12-06. Last modified 2026-06-17.