CVE-2026-27867 (GCVE-0-2026-27867)

Vulnerability from cvelistv5 – Published: 2026-09-25 10:32 – Updated: 2026-09-25 10:43
VLAI
Title
CROSS-SITE SCRIPTING (XSS) VIA THE CMDCOOKIE PARAMETER REGESTA SMART HD-PLC OF TELDAT
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
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-25 10:42 UTC
CWE
  • CWE-79 - Improper neutralization of input during web page generation ('cross-site scripting')
Impacted products
Vendor Product Version CPE status
Teldat Regesta Smart HD-PLC - TLDPH16D2 Affected: 11.02.06.00.02
Unaffected: 11.02.06.00.03
    cpe:2.3:a:teldat:regesta_smart_hd-plc_-_tldph16d2:11.02.06.00.02:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-09-25 08:00
Show details on NVD website

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              "value": "The\nprovider has implemented the new version 11.02.06.00.03 which solves the\nsecurity problems detected in the affected version. The end user has to\ndownload the new version in the Teldat - Client Support Portal and\nimplement it in the device ( https://support.teldat.com/portal/supportcontent?page=cgs-customer-global-support\u0026none=true\u0026language=en-US )."
            }
          ],
          "source": {
            "advisory": "HRTU#0004",
            "discovery": "EXTERNAL"
          },
          "timeline": [
            {
              "lang": "en",
              "time": "2026-07-10T08:00:00.000Z",
              "value": "Vulnerability detection by the researchers"
            },
            {
              "lang": "en",
              "time": "2026-07-16T08:00:00.000Z",
              "value": "Report from researchers to the CNA of HackRTU"
            },
            {
              "lang": "en",
              "time": "2026-07-16T08:00:00.000Z",
              "value": "Report from HackRTU CNA to the provider"
            },
            {
              "lang": "en",
              "time": "2026-07-21T08:00:00.000Z",
              "value": "Second report from HackRTU CNA to the provider"
            },
            {
              "lang": "en",
              "time": "2026-09-25T08:00:00.000Z",
              "value": "Vulnerabilities published by HackRTU\u0027s CNA"
            }
          ],
          "title": "CROSS-SITE SCRIPTING (XSS) VIA THE CMDCOOKIE PARAMETER REGESTA SMART HD-PLC OF TELDAT",
          "x_generator": {
            "engine": "Vulnogram 1.0.5"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "ffb98d57-deaa-4918-a669-5225ccc13e39",
        "assignerShortName": "HackRTU",
        "cveId": "CVE-2026-27867",
        "datePublished": "2026-09-25T10:32:58.916Z",
        "dateReserved": "2026-02-24T08:59:28.139Z",
        "dateUpdated": "2026-09-25T10:43:05.972Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.


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