CVE-2026-4293

Kieback & Peter DDC Building Controllers Cross-site Scripting

CVSS 5.3 MEDIUMEPSS 0.3%CWE-79

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 5.3EPSS 0.3%KEV nãoPoC —Patch —

Lifecycle

20 May 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

The affected Kieback & Peter DDC building controllers are vulnerable to cross-site scripting, enabling JavaScript to be executed by the victim's browser, which allows the attacker to control the browser.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Affected products

Kieback & Peter · DDC4002 Kieback & Peter · DDC4002e Kieback & Peter · DDC4020e Kieback & Peter · DDC4040e Kieback & Peter · DDC4100 Kieback & Peter · DDC4200 Kieback & Peter · DDC4200e Kieback & Peter · DDC4200-L Kieback & Peter · DDC4400 Kieback & Peter · DDC4400e Kieback & Peter · DDC520

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References

https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-139-05.json https://www.cisa.gov/news-events/ics-advisories/icsa-26-139-05