CVE-2021-42027: Siemens Sinumerik Edge

High severity, CVSS 7.4. EPSS: 0.5% chance of exploitation in the next 30 days.

A vulnerability has been identified in SINUMERIK Edge (All versions < V3.2). The affected software does not properly validate the server certificate when initiating a TLS connection. This could allow an attacker to spoof a trusted entity by interfering in the communication path between the client and the intended server.

Affected products

• Siemens Sinumerik Edge: before 3.2 (fixed in 3.2)

Published 2021-12-14. Last modified 2026-06-17.