Teldat Regesta Smart HD-PLC up to 11.02.06.00.02 /upgrade/index.html cmdcookie cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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3.4$0-$5k0.32+

Summaryinfo

A vulnerability has been found in Teldat Regesta Smart HD-PLC up to 11.02.06.00.02 and classified as problematic. The impacted element is an unknown function of the file /upgrade/index.html. The manipulation of the argument cmdcookie leads to cross site scripting. This vulnerability is documented as CVE-2026-27867. The attack can be initiated remotely. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Teldat Regesta Smart HD-PLC up to 11.02.06.00.02. It has been rated as problematic. This issue affects an unknown part of the file /upgrade/index.html. The manipulation of the argument cmdcookie with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. The summary by CVE is:

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

The advisory is shared at hackrtu.com. The identification of this vulnerability is CVE-2026-27867 since 02/24/2026. The exploitation is known to be easy. The attack may be initiated remotely. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

By approaching the search of inurl:upgrade/index.html it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 11.02.06.00.03 eliminates this vulnerability.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 3.5
VulDB Meta Temp Score: 3.4

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Google Hack: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Regesta Smart HD-PLC 11.02.06.00.03

Timelineinfo

02/24/2026 CVE reserved
09/25/2026 +212 days Advisory disclosed
09/25/2026 +0 days VulDB entry created
09/25/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: hackrtu.com
Status: Confirmed

CVE: CVE-2026-27867 (🔒)
GCVE (CVE): GCVE-0-2026-27867
GCVE (VulDB): GCVE-100-410021

Entryinfo

Created: 09/25/2026 13:53
Changes: 09/25/2026 13:53 (67)
Complete: 🔍
Cache ID: 216::103

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