CVE-2021-33721

Severity: high (CVSS 7.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-08-10 · updated 2026-06-17
Weakness: CWE-78

Description

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; 1.0, 1.0-sp1 — fixed in 1.0

How to fix

Upgrade to a fixed version: Siemens Sinec Network Management System 1.0. Check the vendor advisory for mitigations.

References

https://cert-portal.siemens.com/productcert/pdf/ssa-756744.pdf
https://cert-portal.siemens.com/productcert/pdf/ssa-756744.pdf

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