CVE-2026-102551

CVE-2026-102551 · Improper verification of the source of a communication channel in FreeRTOS-Plus-TCP Router Advertisement handling

This page contains facts from public vulnerability sources. Check the original advisory before updating.

Improper verification of the source of a communication channel in the IPv6 Router Advertisement handler in Amazon FreeRTOS-Plus-TCP before V4.4.2 might allow a remote third-party to influence an endpoint's IPv6 default gateway, on-link prefix, and address configuration via a crafted Router Advertisement. To remediate this issue, users should upgrade to version V4.4.2.

CVSS 9.2 · Critical · EPSS 0.3%

Published: 2026-10-16T17:27:38.483Z
Updated: 2026-10-19T12:51:13.488Z

Affected products and versions

freertos-plus-tcp
Versions
- ≥ 0, ≤ 4.4.1: Affected (custom)
No fix published

Original sources

https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/V4.4.2
https://aws.amazon.com/security/security-bulletins/2026-139-aws/
https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/security/advisories/GHSA-pjq5-fqrr-g6pv
https://nvd.nist.gov/vuln/detail/CVE-2026-102551

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CVE-2026-102551 · Improper verification of the source of a communication channel in FreeRTOS-Plus-TCP Router Advertisement handling

Affected products and versions

freertos-plus-tcp

Original sources