CVE-2021-33721: Siemens Sinec Network Management System

High severity, CVSS 7.2. EPSS: 2.7% chance of exploitation in the next 30 days.

A vulnerability has been identified in SINEC NMS (All versions < V1.0 SP2). The affected application incorrectly neutralizes special elements when creating batch operations which could lead to command injection. An authenticated remote attacker with administrative privileges could exploit this vulnerability to execute arbitrary code on the system with system privileges.

Affected products

• Siemens Sinec Network Management System: before 1.0 (fixed in 1.0); version 1.0 only

Published 2021-08-10. Last modified 2026-06-17.