CVE-2026-102551 PUBLISHED

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

Assigner: AMZN
Reserved: 29.09.2026 Published: 16.10.2026 Updated: 16.10.2026

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 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
CVSS Score: 7.7

Attack Vector	Network	Scope	Unchanged
Attack Complexity	High	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	High
User Interaction	None	Availability Impact	Low

CVSS 3.1

CVSS 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
CVSS Score: 9.2

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	Present	Availability	Low	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	FreeRTOS
Product	FreeRTOS-Plus-TCP
Versions	Default: unaffected affected from 0 to 4.4.1 (incl.)

Credits

Causal Security finder

References

Problem Types

CWE-940 Improper verification of source of a communication channel CWE

Impacts

CAPEC-194 Fake the Source of Data