CVE-2026-27870: Teldat Regesta Smart Hd-PLC - TLDPH16D2

Medium severity, CVSS 4.8. EPSS: 0.5% chance of exploitation in the next 30 days.

An attacker with access via network to the Regesta Smart HD-PLC of the provider Teldat (in this case, registration action IS required) who has the vulnerable software could, introduce arbitrary JavaScript by injecting a Cross-site Scripting (XSS)  payload into the 'Hostname' field of the configuration file resulting in a XSS in the path /upgrade/query.php?cmd=p+3%3Bversion. This issue affects Regesta Smart HD-PLC - TLDPH16D2: 11.02.05.10.02.

Affected products

• Teldat Regesta Smart Hd-PLC - TLDPH16D2: version 11.02.05.10.02 only

Published 2026-06-17. Last modified 2026-07-01.