{"id":"CVE-2026-102552","title":"Improper verification of the source of a communication channel in FreeRTOS-Plus-TCP DNS resolver","summary":"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.\n\n\n…","severity":"medium","cvss":5.9,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N","cvssSource":"cna","cwe":["CWE-940"],"vendor":"FreeRTOS","product":"FreeRTOS-Plus-TCP","affected":["FreeRTOS-Plus-TCP <= 4.4.1"],"published":"2026-10-16","updated":"2026-10-16","sourceUpdated":"2026-10-16T17:32:15.640Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-102552","references":[{"url":"https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/V4.4.2"},{"url":"https://aws.amazon.com/security/security-bulletins/2026-139-aws/"},{"url":"https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/security/advisories/GHSA-h4fw-pv82-p7h5"}],"tags":["cve.org"],"ingestedAt":"2026-10-16T18:43:08.771Z","slug":"CVE-2026-102552","body":"## Overview\n\nImproper 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.\n\n\n\nTo remediate this issue, users should upgrade to version V4.4.2 and enable ipconfigDNS_CHECK_REPLY_SOURCE_IP.\n\n## Affected\n\n- `FreeRTOS-Plus-TCP <= 4.4.1`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":32,"depthScoreParts":{"impact":32.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}