High severity7.1NVD Advisory· Published May 12, 2026· Updated May 12, 2026
CVE-2026-25789
CVE-2026-25789
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Patches
Vulnerability mechanics
References
1News mentions
1- Siemens SIMATIC S7 PLC Web ServerCISA ICS Advisories