---
id: CVE-2026-19061
title: A flaw has been found in Insta InstaKNXServiceApp 1.2.3.1469
summary: >-
  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
  verificat…
severity: low
cvss: 3.7
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N'
cwe:
  - CWE-345
published: '2026-08-06'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T13:17:29.827'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-19061'
references:
  - url: 'https://gist.github.com/isZzzz/f9da7d76cf2f7b93ec3f90efe17ed323'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/cve/CVE-2026-19061'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/864343'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/386531'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/386531/cti'
    label: cna@vuldb.com
tags:
  - nvd
  - cve.org
epss: 0.00218
epssPercentile: 0.12198
ingestedAt: '2026-08-08T21:30:13.818Z'
vendor: Insta
product: InstaKNXServiceApp
affected:
  - InstaKNXServiceApp 1.2.3.1469
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-08-08T02:14:57.365266Z'
---

## Overview

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. There are still doubts about whether this vulnerability truly exists. The vendor explains: "[T]he entry suggests that the device does not verify the authenticity of the update. This is incorrect. The device performs an authenticity check after the complete update has been transferred. If this check fails, the update is not installed and the previously installed firmware continues to run".

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.