XSS in Siemens Simatic Drive Controller CPU 1504d Tf
CVE-2026-25789
Affected devices do not properly validate and sanitize filenames on the Firmware Update page. This could allow a remote attacker to social engineer the user into selecting the modified firmware file to be uploaded. This would result in malitcious JavaScript execution in the context of the authenticated user's session without requiring the file to be uploaded, potentially leading to session hijacking or credential theft.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (39.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 39.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002
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-2026-25789?
- CVE-2026-25789 is a high-severity vulnerability in Siemens Simatic Drive Controller CPU 1504d Tf, classified under Cross-site Scripting. CVSS score: 7.1/10. Published 2026-05-12.
- How severe is CVE-2026-25789?
- High severity. CVSS v3 base score is 7.1 out of 10.