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Vulnerability record · CVE-2021-33721 · published 10 August 2021

CVE-2021-33721: Siemens sinec network management system os command injection vulnerability

Siemens · Sinec Network Management System

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.

7.2 CVSS 3.1 High EPSS 2.7% · top 14.8% CWE-78 · OS command injection
7.2CVSS 3.1 base score, v2 9.0
2.7%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Source: NIST National Vulnerability Database (record CVE-2021-33721), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.