CVE-2026-27867

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

  • Published Sep 25, 2026
  • CVSS 4.8 medium
  • 0.4% chance of exploitation in the next 30 days (EPSS)

Affected software

CVE-2026-27867 at the National Vulnerability Database