CVE-2026-27867

CROSS-SITE SCRIPTING (XSS) VIA THE CMDCOOKIE PARAMETER REGESTA SMART HD-PLC OF TELDAT

Published Sep 25, 2026 CVSS 4.0 · 4.8 Medium EPSS < 1% KEV · Not listed
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

Remediation

Vendor Solution

The provider has implemented the new version 11.02.06.00.03 which solves the security problems detected in the affected version. The end user has to download the new version in the Teldat - Client Support Portal and implement it in the device ( https://support.teldat.com/portal/supportcontent?page=cgs-customer-global-support&none=true&language=en-US ).

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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
Title CROSS-SITE SCRIPTING (XSS) VIA THE CMDCOOKIE PARAMETER REGESTA SMART HD-PLC OF TELDAT
First Time appeared Teldat
Teldat regesta Smart Hd-plc - Tldph16d2
Weaknesses CWE-79
CPEs cpe:2.3:a:teldat:regesta_smart_hd-plc_-_tldph16d2:11.02.06.00.02:*:*:*:*:*:*:*
cpe:2.3:a:teldat:regesta_smart_hd-plc_-_tldph16d2:11.02.06.00.03:*:*:*:*:*:*:*
Vendors & Products Teldat
Teldat regesta Smart Hd-plc - Tldph16d2
References
Metrics cvssV4_0

{'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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
HackRTU
Published
Updated
Sep 25, 2026, 10:43 AM
Reserved
Feb 24, 2026, 8:59 AM
Status
Deferred
Published
Sep 25, 2026, 11:17 AM
Modified
Sep 30, 2026, 5:32 PM