CVE-2026-19061 (GCVE-0-2026-19061)

Vulnerability from cvelistv5 – Published: 2026-08-06 17:00 – Updated: 2026-10-13 12:58 Disputed
VLAI
Title
Insta InstaKNXServiceApp Firmware Update CreateWebClientAndDownloadFileList data authenticity
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 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".
Severity
6.3 (Medium)
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X
3.7 (Low)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N/E:X/RL:X/RC:R
3.7 (Low)
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N/E:X/RL:X/RC:R
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-08 02:14 UTC
CWE
  • CWE-345 - Insufficient Verification of Data Authenticity
Assigner
VulDB CNA under the mitre root
CNA scorecard B 83/100 over 3881 records in the last 180 days details
References
URL Tags
https://vuldb.com/vuln/386531 vdb-entrytechnical-description
https://vuldb.com/vuln/386531/cti signaturepermissions-required
https://vuldb.com/cve/CVE-2026-19061 third-party-advisory
https://vuldb.com/submit/864343 third-party-advisory
https://gist.github.com/isZzzz/f9da7d76cf2f7b93ec… broken-link
Impacted products
Vendor Product Version CPE status
Insta InstaKNXServiceApp Affected: 1.2.3.1469
    cpe:2.3:a:insta:instaknxserviceapp:*:*:*:*:*:*:*:*
Create a notification for this product.
Credits
isZzzzz (VulDB User) VulDB CNA Team
Show details on NVD website
To clipboard 

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}



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    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.