Advisory Details

June 16th, 2025

Siemens TeleControl Server Basic VerifyUser SQL Injection Remote Code Execution Vulnerability

ZDI-25-383
ZDI-CAN-25914

CVE ID CVE-2025-27539
CVSS SCORE 9.8, AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AFFECTED VENDORS Siemens
AFFECTED PRODUCTS TeleControl Server Basic
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Siemens TeleControl Server Basic. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the implementation of the VerifyUser method. The issue results from the lack of proper validation of a user-supplied string before using it to construct SQL queries. An attacker can leverage this vulnerability to execute code in the context of NETWORK SERVICE.

ADDITIONAL DETAILS Siemens has issued an update to correct this vulnerability. More details can be found at:
https://cert-portal.siemens.com/productcert/html/ssa-443402.html
DISCLOSURE TIMELINE
  • 2025-02-21 - Vulnerability reported to vendor
  • 2025-06-16 - Coordinated public release of advisory
  • 2025-06-16 - Advisory Updated
CREDIT Anonymous
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