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9.6
CVE-2026-25293: Siemens SIMATIC S7-1200 PLC Software Authentication Bypass
CVE-2026-25293
Summary
The Siemens SIMATIC S7-1200 PLC software has a flaw in its authentication system. This allows unauthorized access to the system, potentially leading to data tampering or system crashes. To protect your system, ensure you keep the software up to date and follow recommended security best practices.
Original title
Buffer overflow due to incorrect authorization in PLC FW
Original description
Buffer overflow due to incorrect authorization in PLC FW
nvd CVSS3.1
9.6
Vulnerability type
CWE-863
Incorrect Authorization
Published: 4 May 2026 · Updated: 28 May 2026 · First seen: 4 May 2026