CVE-2026-19061Network attack vector

Firmware-list tampering via unverified download authenticity

Published Aug 6, 2026 · Updated Aug 6, 2026

Insufficient data-authenticity verification in INSTA KNX Service App 1.2.3.1469 allows remote attackers to alter firmware-download data. CreateWebClientAndDownloadFileList in the Firmware Update Handler accepts downloaded file-list data without sufficiently verifying its authenticity; the published record does not identify the missing validation or transport condition. Reaching the condition requires a complex remote manipulation; the reported consequence is firmware-download data modification, not read access or service interruption.

CVSS severity6.3
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insufficient data-authenticity verification in INSTA KNX Service App 1.2.3.1469 allows remote attackers to alter firmware-download data. CreateWebClientAndDownloadFileList in the Firmware Update Handler accepts downloaded file-list data without sufficiently verifying its authenticity; the published record does not identify the missing validation or transport condition. Reaching the condition requires a complex remote manipulation; the reported consequence is firmware-download data modification, not read access or service interruption.

The record

CVE
CVE-2026-19061
Published
Aug 6, 2026
Updated
Aug 6, 2026
Vendor
Insta GmbH
Product
INSTA KNX Service App
Classifications
CWE-345
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.2.3.1469

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Insta GmbH · INSTA KNX Service Appversion=1.2.3.1469

Published CVSS scores

6.3VulDBCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
3.7VulDBCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
2.6VulDBAV:N/AC:H/Au:N/C:N/I:P/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-345Insufficient Verification of Data Authenticity

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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