Paper/Archive/CVE-2026-102551

CVE-2026-102551

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

EPSS 0.3%CVSS 9.2

critical.is priorityof 100

CVSS 9.2 (CNA)9.2 / 10 × 3027.6 Not in CISA KEV+300.0 EPSS percentile 19.7.197 × 203.9 No public exploit+100.0 SSVC exploitation: none+100.0

Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource

FreeRTOS-Plus-TCP≤ 4.4.1–CNA

Scores by source

AMZN (CNA)9.2CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N

AMZN (CNA)7.7CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L

CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

patchgithub.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/V4.4.2 advisoryaws.amazon.com/security/security-bulletins/2026-139-aws writeupgithub.com/FreeRTOS/FreeRTOS-Plus-TCP/security/advisories/GHSA-pjq5-fqrr-g6pv