CVE-2023-32737: Siemens SIMATIC Step 7

Medium severity, CVSS 6.3. EPSS: 0.2% chance of exploitation in the next 30 days.

A vulnerability has been identified in SIMATIC STEP 7 Safety V18 (All versions < V18 Update 2). Affected applications do not properly restrict the .NET BinaryFormatter when deserializing user-controllable input. This could allow an attacker to cause a type confusion and execute arbitrary code within the affected application. This is the same issue that exists for .NET BinaryFormatter https://docs.microsoft.com/en-us/visualstudio/code-quality/ca2300.

Affected products

• Siemens SIMATIC Step 7: before 18 (fixed in 18)
• Siemens SIMATIC Step 7 Safety v18: before V18 Update 2 (fixed in V18 Update 2)

Published 2024-07-09. Last modified 2026-06-17.