Amazon FreeRTOS-Plus-TCP up to 4.4.1 DNS Resolver input validation

CVSS Meta Temp Score
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CTI Interest Score
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5.5$0-$5k3.24-

Summaryinfo

A vulnerability, which was classified as problematic, was found in Amazon FreeRTOS-Plus-TCP up to 4.4.1. Impacted is an unknown function of the component DNS Resolver. Executing a manipulation can lead to input validation. This vulnerability is registered as CVE-2026-102552. It is possible to launch the attack remotely. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Amazon FreeRTOS-Plus-TCP up to 4.4.1. It has been declared as problematic. This vulnerability affects some unknown functionality of the component DNS Resolver. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect integrity. CVE summarizes:

Improper verification of the source of a communication channel in the DNS resolver in Amazon FreeRTOS-Plus-TCP before V4.4.2 might allow remote third-party to insert a chosen address into the device's DNS cache via a forged DNS reply. To remediate this issue, users should upgrade to version V4.4.2 and enable ipconfigDNS_CHECK_REPLY_SOURCE_IP.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-102552 since 09/29/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available.

Upgrading to version 4.4.2 eliminates this vulnerability.

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Productinfo

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.6
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 5.9
CNA Vector (AMZN): 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: FreeRTOS-Plus-TCP 4.4.2

Timelineinfo

09/29/2026 CVE reserved
10/16/2026 +17 days Advisory disclosed
10/16/2026 +0 days VulDB entry created
10/16/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-102552 (🔒)
GCVE (CVE): GCVE-0-2026-102552
GCVE (VulDB): GCVE-100-421360

Entryinfo

Created: 10/16/2026 19:48
Changes: 10/16/2026 19:48 (76)
Complete: 🔍
Cache ID: 216::103

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