RCE in Siemens Simatic Drive Controller CPU 1504d Tf
CVE-2025-40943
Affected devices do not properly sanitize contents of trace files. This could allow an attacker to inject code through social engineering an authorized user, who has the function right "Read diagnostics", to import a specially crafted trace file. The malicious trace file is insufficiently sanitized and malicious code could be executed in the clients browser session and trigger PLC operations via the webserver that the legitimate user is authorized to perform.
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
EPSS: 0.005 (39.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 39.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: +0.000
Affected products
- Siemens Simatic Drive Controller CPU 1504d Tf — versions 0
- Siemens Simatic Drive Controller CPU 1507d Tf — versions 0
- Siemens Simatic Et 200sp CPU 1510sp-1 Pn — versions 0
- Siemens Simatic Et 200sp CPU 1510sp F-1 Pn — versions 0
- Siemens Simatic Et 200sp CPU 1512sp-1 Pn — versions 0
- Siemens Simatic Et 200sp CPU 1512sp F-1 Pn — versions 0
- Siemens Simatic Et 200sp CPU 1514sp-2 Pn — versions 0
- Siemens Simatic Et 200sp CPU 1514sp F-2 Pn — versions 0
- Siemens Simatic Et 200sp CPU 1514spt-2 Pn — versions 0
- Siemens Simatic Et 200sp CPU 1514spt F-2 Pn — versions 0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2025-40943?
- CVE-2025-40943 is a critical-severity vulnerability in Siemens Simatic Drive Controller CPU 1504d Tf, classified under Eval Injection. CVSS score: 9.6/10. Published 2026-03-10.
- How severe is CVE-2025-40943?
- Critical severity. CVSS v3 base score is 9.6 out of 10.