Critical severity9.1NVD Advisory· Published May 12, 2026· Updated May 12, 2026
CVE-2026-25786
CVE-2026-25786
Description
Affected devices do not properly validate and sanitize PLC/station name rendered on the "communication" parameters page of the web interface. This could allow an authenticated attacker who is authorized to download a TIA project into the product, to inject malicious scripts into the page. If a benign user with appropriate rights accesses the "communication" parameters page, the malicious code would be executed in the scope of their web session.
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