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

References

https://www.teldat.com/es/

https://www.hackrtu.com/blog/CNA-HRTU-0004/

https://www.hackrtu.com/blog/CNA-CVE-2026-27867/

https://support.teldat.com/portal/supportcontent?page=cgs-customer-global-support&none=true&language=en-US

https://support.teldat.com/images/content/docs/Teldat_dm1087_regesta_smart_nessum_series_installation(1).pdf

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-86931

Details

Source: Mitre, NVD

Published: 2026-09-25

Updated: 2026-09-30

Risk Information

CVSS v2

Base Score: 4.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 6.1

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

Severity: Medium

CVSS v4

Base Score: 4.8

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Severity: Medium

EPSS

EPSS: 0.0037