CVE-2026-102551

HIGH 7.7

Improper verification of the source of a communication channel in FreeRTOS-Plus-TCP Router Advertisement handling

CVSS Score

7.7

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-940
Vendor	freertos
Product	freertos-plus-tcp
Published	Oct 16, 2026
Last Updated	Oct 16, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

Low

Affected Versions

FreeRTOS / FreeRTOS-Plus-TCP

0 ≤ 4.4.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

Causal Security