Insufficient Data Authenticity Check in Insta InstaKNXServiceApp

Publication date: 2026-08-06

Last updated on: 2026-08-06

Assigner: VulDB

Description

A flaw has been found in Insta InstaKNXServiceApp 1.2.3.1469. Affected by this issue is the function CreateWebClientAndDownloadFileList of the component Firmware Update Handler. Executing a manipulation can lead to insufficient verification of data authenticity. It is possible to launch the attack remotely. Attacks of this nature are highly complex. The exploitation is known to be difficult. The vendor was contacted early about this disclosure but did not respond in any way.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-08-06

Last Modified

2026-08-06

Generated

2026-08-07

AI Q&A

2026-08-07

EPSS Evaluated

N/A

NVD

CVE-2026-19061

Affected Vendors & Products

Vendor	Product	Version / Range
insta	instaknserviceapp	1.2.3.1469

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-345	The product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data.

Attack-Flow Graph

Executive Summary

This vulnerability is in Insta InstaKNXServiceApp 1.2.3.1469 where the CreateWebClientAndDownloadFileList function in the Firmware Update Handler component fails to properly verify data authenticity. This could allow remote attackers to manipulate firmware updates due to insufficient validation.

Impact Analysis

An attacker could exploit this to push malicious firmware updates to your system remotely. This might lead to unauthorized code execution, data breaches, or system compromise. However, the attack is described as highly complex and difficult to execute.

Mitigation Strategies

Immediately update or patch the Insta InstaKNXServiceApp to the latest version if available. If no patch exists, consider disabling the Firmware Update Handler component or isolating the affected system from the network to prevent remote exploitation.

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