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.
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
1News mentions
1- Siemens SIMATIC S7 PLC Web ServerCISA Alerts