CVE Catalog

CVE-2026-19061

LowCVSS 3.7
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.22%

11th percentile - higher than 11% of all known CVEs

Summary

In Insta InstaKNXServiceApp 1.2.3.1469, the CreateWebClientAndDownloadFileList function (Firmware Update Handler component) may lead to insufficient verification of data authenticity. The attack can be launched remotely but is highly complex and difficult to exploit. There are doubts about whether this vulnerability truly exists; the vendor states that the device performs an authenticity check after the complete update is transferred and does not install unverified firmware.

Risk Assessment

The potential risk is the installation of unauthorized firmware, but due to the high attack complexity and doubts about the vulnerability's existence, the risk is limited. The vendor denies the vulnerability.

Recommendation

Monitor official vendor communications regarding InstaKNXServiceApp and verify whether the device actually performs an authenticity check on updates. Apply any available firmware updates.

Related vulnerabilities

Original NVD description (English source)

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".

Vulnerability data from NVD (NIST) · CISA KEV · EPSS