CVE-2026-102551

high

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…

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.

CVSS

7.7

7.7 (CVSS v3.1)

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L

Severity source: NVD CVSS v3.1 (ff89ba41-3aa1-4d27-914a-91399e9639e5)

Timeline (UTC)

Published: 2026-10-16 18:17

Modified: 2026-10-19 13:16

NVD status: Awaiting Analysis

Last synced 1 day ago

Verified against the source API 2026-10-27 07:03 UTC

Exploitation

Not listed in CISA KEV (as of last catalog sync)

Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).

Affected products

Not reported by the source (unknown — not "none").

Weakness classification (CWE)

CWE-940

Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.

Mitigation & advisories

No vendor advisory or patch reference tagged by NVD. Check the references below.

References

https://aws.amazon.com/security/security-bulletins/2026-139-aws/ ff89ba41-3aa1-4d27-914a-91399e9639e5
https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/V4.4.2 ff89ba41-3aa1-4d27-914a-91399e9639e5
https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/security/advisories/GHSA-pjq5-fqrr-g6pv ff89ba41-3aa1-4d27-914a-91399e9639e5

Data sources

NVD CVE API 2.0 — fetched 2026-10-27 07:03 UTC · record ↗

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