All vulnerabilities
CVE-2026-102552GHSA-h4fw-pv82-p7h5

Improper verification of the source of a communication channel in FreeRTOS-Plus-TCP DNS resolver

FreeRTOS FreeRTOS-Plus-TCP
Open in ThreatlineRecord JSON
CVSS
5.9Medium
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.23%Chance of exploitation activity in the next 30 days, higher than 13% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Published16 Oct 2026Updated 19 Oct 2026CVE List

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

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.

Text from GitHub Advisory Database

Affected versions 2

  • FreeRTOS-Plus-TCPaffected: all versions through 4.4.1CVE List
  • FreeRTOS-Plus-TCP<=V4.4.1GitHub

References 3