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.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements Present

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
FreeRTOS FreeRTOS-Plus-TCP unaffected
Version Status Constraints
0 affected ≤ 4.4.1

No data.

No data.

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Project Subscriptions

Vendors Products
Freertos Subscribe
Freertos-plus-tcp Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://aws.amazon.com/security/security-bulletins/2026-139-aws/ cve-icon cve-icon
https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/V4.4.2 cve-icon cve-icon
https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/security/advisories/GHSA-pjq5-fqrr-g6pv cve-icon cve-icon
History

Fri, 16 Oct 2026 17:45:00 +0000

Type Values Removed Values Added
Description 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.
Title Improper verification of the source of a communication channel in FreeRTOS-Plus-TCP Router Advertisement handling
First Time appeared Freertos
Freertos freertos-plus-tcp
Weaknesses CWE-940
CPEs cpe:2.3:a:freertos:freertos-plus-tcp:*:*:*:*:*:*:*:*
Vendors & Products Freertos
Freertos freertos-plus-tcp
References
Metrics cvssV3_1

{'score': 7.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L'}

cvssV4_0

{'score': 9.2, 'vector': '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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: AMZN

Published:

Updated: 2026-10-16T17:30:47.034Z

Reserved: 2026-09-29T13:04:13.721Z

Link: CVE-2026-102551

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-16T18:17:14.750

Modified: 2026-10-16T18:17:14.750

Link: CVE-2026-102551

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-16T18:30:14Z

Weaknesses