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CVE-2026-63353 is a critical cross-site scripting (XSS) vulnerability in Siemens SIMATIC Drive Controller CPU 1504D TF. The issue arises because comment fields in imported trace files are not properly sanitized before being rendered on the Trace page. An attacker can craft a malicious trace file that, when imported by an authorized user with 'Read diagnostics' rights, executes attacker-controlled JavaScript in the user's browser. This could allow unauthorized PLC operations within the user's authorization scope.

Siemens SIMATIC Drive Controller CPU 1504D TF contains a CWE-79 improper input neutralization vulnerability. The product fails to sanitize comment fields in imported trace files before rendering them on the Trace page. An attacker can exploit this by social engineering an authorized user to import a malicious trace file, leading to execution of arbitrary JavaScript in the user's browser session. This script can perform PLC operations through the web server with the user's privileges. The vulnerability has a CVSS 3.1 score of 9.6, indicating critical severity.

CVE-2026-63353 is a critical cross-site scripting (XSS) vulnerability in Siemens SIMATIC Drive Controller CPU 1504D TF. The issue arises because comment fields in imported trace files are not properly sanitized before being rendered on the Trace page. An attacker can craft a malicious trace file tha

CVE-2026-63353: 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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