CVE-2026-27867

Medium

Description

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 firmware version could inject a specific payload via the parameter "cmdcookie" withing the /upgrade/index.html resulting in to a Cross-Site Scripting (XSS). This issue affects Regesta Smart HD-PLC - TLDPH16D2: 11.02.06.00.02

SeverityMedium

CVSS4.8

Exploit probability—

ProductRegesta Smart HD-PLC - TLDPH16D2

PublishedSep 25, 2026

First seenSep 25, 2026

Weakness typeCWE-79Cross-site scripting (XSS)

How to fix

Patches

hackrtu.com/blog/CNA-HRTU-0004/
hackrtu.com/blog/CNA-CVE-2026-27867/
support.teldat.com/portal/supportcontent?page=cgs-customer-global-support&none=true&language=en-US

Affected products

Product	Affected versions	Fixed in
Teldat Regesta Smart HD-PLC - TLDPH16D2	11.02.06.00.02	—

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