CVE-2026-102551— Improper verification of the source of a communication channel in FreeRTOS-Plus-TCP Router Advertisement handling
Quick assessment
Affected
FreeRTOS FreeRTOS-Plus-TCP
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
在 Amazon FreeRTOS-Plus-TCP V4.4.2 之前的版本中，IPv6 路由器通告（Router Advertisement）处理程序未能正确验证通信信道的来源。该缺陷可能使远程第三方通过精心构造的路由器通告，影响终端设备的 IPv6 默认网关、链路前缀及地址配置。 为修复此问题，建议用户将系统升级至 V4.4.2 版本。
Possible ATT&CK Techniques 2 AI
T1059 · Command and Scripting Interpreter T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| FreeRTOS | FreeRTOS-Plus-TCP | ≤ 4.4.1 |
affected |
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I. Basic Information for CVE-2026-102551
Vulnerability Information
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Vulnerability Title
Improper verification of the source of a communication channel in FreeRTOS-Plus-TCP Router Advertisement handling
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
通信信道源的不正确验证
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| FreeRTOS | FreeRTOS-Plus-TCP | 0 ~ 4.4.1 | - |
|
II. Public POCs for CVE-2026-102551
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-102551 (2)
Vendor Pages for CVE-2026-102551 (1)
Same Patch Batch · FreeRTOS · 2026-10-16 · 4 CVEs total
| CVE-2026-109587 | 8.8 HIGH | Incorrect authorization in the Arm Cortex-R82 MPU port in FreeRTOS-Kernel |
| CVE-2026-109588 | 8.8 HIGH | Numeric truncation in the MPU buffer authorization check in FreeRTOS-Kernel |
| CVE-2026-102552 | 5.9 MEDIUM | Improper verification of the source of a communication channel in FreeRTOS-Plus-TCP DNS re |
IV. Related Vulnerabilities
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V. Comments for CVE-2026-102551
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