CVE-2026-25789 HIGH

CVE-2026-25789

Vendor Siemens
Product SIMATIC Drive Controller CPU 1504D TF
Weakness CWE-79 · XSS
Published May 12, 2026
Last update May 12, 2026

CVSS base score

7.1/10
Attack vector Network
Attack complexity High
Privileges required Low
User interaction Required
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

May 12, 2026 CVE published
May 12, 2026 Record updated