{"id":"CVE-2026-102551","title":"Improper verification of the source of a communication channel in FreeRTOS-Plus-TCP Router Advertisement handling","summary":"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 p…","severity":"high","cvss":7.7,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L","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":"2026-10-16T17:30:47.034Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-102551","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-pjq5-fqrr-g6pv"}],"tags":["cve.org"],"ingestedAt":"2026-10-16T18:43:08.787Z","epss":0.00273,"epssPercentile":0.18427,"slug":"CVE-2026-102551","body":"## Overview\n\nImproper 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.\n\n\n\nTo remediate this issue, users should upgrade to version V4.4.2.\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":"twilight","depthScore":42,"depthScoreParts":{"impact":42.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}