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CVE-2026-63357 is a cross-site scripting (XSS) vulnerability in Siemens SIMATIC Drive Controller CPU 1504D TF. The issue arises because the device does not properly sanitize calculated signal data from imported files before displaying it on the Trace page. An attacker could trick an authorized user with 'Read diagnostics' rights into importing a malicious file, leading to execution of attacker-controlled JavaScript in the user's browser. This could allow unauthorized PLC operations within the user's permission scope. The vulnerability has a medium severity with a CVSS score of 6.1.

Siemens SIMATIC Drive Controller CPU 1504D TF improperly neutralizes input during web page generation, specifically failing to sanitize calculated signal data from imported calculated signal files before rendering on the Trace page. This cross-site scripting vulnerability (CWE-79) could be exploited by social engineering an authorized user with 'Read diagnostics' rights to import a crafted file. Successful exploitation enables attacker-controlled JavaScript execution in the user's browser session, potentially allowing PLC operations through the web server within the user's authorization scope.

CVE-2026-63357 is a cross-site scripting (XSS) vulnerability in Siemens SIMATIC Drive Controller CPU 1504D TF. The issue arises because the device does not properly sanitize calculated signal data from imported files before displaying it on the Trace page. An attacker could trick an authorized user 

CVE-2026-63357: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Siemens SIMATIC Drive Controller CPU 1504D TF

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