XSS in Siemens Simatic Drive Controller CPU 1504d Tf
CVE-2026-63353
Affected devices do not properly sanitize comment fields contained in imported trace files before rendering them on the Trace page. This could allow an attacker to social engineer an authorized user who holds the function right “Read diagnostics” into importing a specially crafted trace file. Successful exploitation could allow attacker-controlled JavaScript to execute in the user’s browser session and perform PLC operations through the web server within the scope of the user’s authorization.
Vulnerability class: XSS (Cross-Site Scripting)
Published .
CVSS v3 metric
CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Siemens Simatic Drive Controller CPU 1504d Tf
- Siemens Simatic Drive Controller CPU 1507d Tf
- Siemens Simatic Et 200sp CPU 1510sp-1 Pn
- Siemens Simatic Et 200sp CPU 1510sp F-1 Pn
- Siemens Simatic Et 200sp CPU 1512sp-1 Pn
- Siemens Simatic Et 200sp CPU 1512sp F-1 Pn
- Siemens Simatic Et 200sp CPU 1514sp-2 Pn
- Siemens Simatic Et 200sp CPU 1514sp F-2 Pn
- Siemens Simatic Et 200sp CPU 1514spt-2 Pn
- Siemens Simatic Et 200sp CPU 1514spt F-2 Pn
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-63353?
- CVE-2026-63353 is a critical-severity vulnerability in Siemens Simatic Drive Controller CPU 1504d Tf, classified under Cross-site Scripting. CVSS score: 9.6/10. Published 2026-10-13.
- How severe is CVE-2026-63353?
- Critical severity. CVSS v3 base score is 9.6 out of 10.