{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-102551", "assignerOrgId": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "state": "PUBLISHED", "assignerShortName": "AMZN", "dateReserved": "2026-09-29T13:04:13.721Z", "datePublished": "2026-10-16T17:27:38.483Z", "dateUpdated": "2026-10-19T12:51:13.488Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "shortName": "AMZN", "dateUpdated": "2026-10-16T17:30:47.034Z" }, "title": "Improper verification of the source of a communication channel in FreeRTOS-Plus-TCP Router Advertisement handling", "problemTypes": [ { "descriptions": [ { "lang": "en", "cweId": "CWE-940", "description": "CWE-940 Improper verification of source of a communication channel", "type": "CWE" } ] } ], "impacts": [ { "capecId": "CAPEC-194", "descriptions": [ { "lang": "en", "value": "CAPEC-194 Fake the Source of Data" } ] } ], "affected": [ { "vendor": "FreeRTOS", "product": "FreeRTOS-Plus-TCP", "versions": [ { "status": "affected", "version": "0", "lessThanOrEqual": "4.4.1", "versionType": "custom" } ], "defaultStatus": "unaffected" } ], "cpeApplicability": [ { "operator": "OR", "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:a:freertos:freertos-plus-tcp:*:*:*:*:*:*:*:*", "versionStartIncluding": "0", "versionEndIncluding": "4.4.1" } ] } ] } ], "descriptions": [ { "lang": "en", "value": "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.\n\n\n\nTo remediate this issue, users should upgrade to version V4.4.2.", "supportingMedia": [ { "type": "text/html", "base64": false, "value": "

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.

" } ] } ], "references": [ { "url": "https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/V4.4.2", "tags": [ "release-notes", "patch" ] }, { "url": "https://aws.amazon.com/security/security-bulletins/2026-139-aws/", "tags": [ "vendor-advisory" ] }, { "url": "https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/security/advisories/GHSA-pjq5-fqrr-g6pv", "tags": [ "third-party-advisory" ] } ], "metrics": [ { "format": "CVSS", "scenarios": [ { "lang": "en", "value": "GENERAL" } ], "cvssV3_1": { "version": "3.1", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "LOW", "baseSeverity": "HIGH", "baseScore": 7.7, "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L" } }, { "format": "CVSS", "scenarios": [ { "lang": "en", "value": "GENERAL" } ], "cvssV4_0": { "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "LOW", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "CRITICAL", "baseScore": 9.2, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N" } } ], "credits": [ { "lang": "en", "value": "Causal Security", "type": "finder" } ], "source": { "discovery": "UNKNOWN" }, "x_generator": { "engine": "Vulnogram 0.5.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-10-19T12:50:34.406887Z", "id": "CVE-2026-102551", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-19T12:51:13.488Z" } } ] } }