CVE-2026-102552

high

Description

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.

References

https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/security/advisories/GHSA-h4fw-pv82-p7h5

https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/V4.4.2

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-103022

https://aws.amazon.com/security/security-bulletins/2026-139-aws/

Details

Source: Mitre, NVD

Published: 2026-10-16

Updated: 2026-10-19

Risk Information

CVSS v2

Base Score: 5.4

Vector: CVSS2#AV:N/AC:H/Au:N/C:N/I:C/A:N

Severity: Medium

CVSS v3

Base Score: 5.9

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Severity: Medium

CVSS v4

Base Score: 8.2

Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

Severity: High

EPSS

EPSS: 0.00233