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TI-2026-22211 Aliases CVE-2026-27867GHSA-jj76-67xg-c9gj

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

Priority LOW 22CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Active
Attack complexity
Low
Attack requirements
None
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

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

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0037 31st percentileScored 2026-11-07
Fix Fixed Regesta Smart HD-PLC - TLDPH16D2 (Teldat): 11.02.06.00.03

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
TeldatRegesta Smart HD-PLC - TLDPH16D211.02.06.00.0211.02.06.00.03Patch availableCNA
  • Regesta Smart HD-PLC - TLDPH16D2 VendorTeldat Affected 11.02.06.00.02 Fixed in 11.02.06.00.03 Patch available CNA

Remediation

  • Fix · CNA Regesta Smart HD-PLC - TLDPH16D2 (Teldat) Fixed in 11.02.06.00.03

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-27867
  2. 2026-10-03 Alias added: GHSA-jj76-67xg-c9gj

References

Patch 3

Other 2

  • TI-2024-24418 Incorrect access control in Teldat M1 v11.00.05.50.01 allows attackers to obtain… CVSS 3.1HIGH 7.5
  • TI-2022-18937 Cross Site Scripting vulnerability in Teldats Router RS123, RS123w allows attacker to… CVSS 3.1MEDIUM 4.8
  • TI-2026-22213 WEB SERVICE (HTTP) DENIAL OF SERVICE VIA SLOW HEADERS ON REGESTA SMART HD-PLC OF TELDAT CVSS 4.0MEDIUM 6.9
  • TI-2026-22212 PUBLICATION OF SENSITIVE INFORMATION ON REGESTA SMART HD-PLC OF TELDAT CVSS 4.0MEDIUM 6.9
  • TI-2026-22214 CROSS-SITE SCRIPTING (XSS) VIA MALICIOUS FILE UPLOAD ON REGESTA SMART HD-PLC OF TELDAT CVSS 4.0MEDIUM 4.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences