RCE in Siemens Simatic Drive Controller CPU 1504d Tf

CVE-2026-63350

Affected devices do not properly restrict executable content contained in imported trace files. 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.

Published · last modified .

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

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-63350?
CVE-2026-63350 is a critical-severity vulnerability in Siemens Simatic Drive Controller CPU 1504d Tf, classified under Eval Injection. CVSS score: 9.6/10. Published 2026-10-13.
How severe is CVE-2026-63350?
Critical severity. CVSS v3 base score is 9.6 out of 10.