OTPulse

Siemens SINEC NMS

Plan PatchCVSS 9.8ICS-CERT ICSA-25-191-01Jul 8, 2025
Siemens
Attack path
Attack VectorNetwork
Auth RequiredNone
ComplexityLow
User InteractionNone needed
Summary

Siemens SINEC NMS before V4.0 contains multiple vulnerabilities (SQL injection, missing authentication, path traversal) that allow an attacker with network access to execute arbitrary code and elevate privileges. An attacker could gain full administrative control of the NMS platform, which manages and monitors Siemens industrial networks. Siemens has released version 4.0 as a fix and recommends immediate update.

What this means
What could happen
An attacker could gain administrative control of SINEC NMS and execute arbitrary commands, allowing them to manipulate network configuration, disable monitoring, or compromise connected industrial systems across your Siemens infrastructure.
Who's at risk
This affects organizations running Siemens SINEC NMS for industrial network management. Plant operations teams, automation engineers, and network administrators managing Siemens infrastructure should prioritize patching this critical vulnerability immediately.
How it could be exploited
An attacker with network access to SINEC NMS could inject malicious SQL commands or exploit missing authentication checks to bypass access controls and escalate privileges to execute arbitrary code on the NMS server, gaining control over the industrial network it manages.
Prerequisites
  • Network access to SINEC NMS (port/service unspecified in advisory)
  • SINEC NMS version prior to V4.0 must be deployed
remotely exploitableno authentication requiredlow complexityhigh CVSS (9.8)affects network management and monitoring of industrial systems
Exploitability
Some exploitation risk — EPSS score 1.7%
Affected products (1)
ProductAffected VersionsFix Status
SINEC NMS< V4.04.0
Remediation & Mitigation
0/4
Do now
0/1
WORKAROUNDRestrict network access to SINEC NMS to authorized engineering and operations staff only; block external internet access
Schedule — requires maintenance window
0/3

Patching may require device reboot — plan for process interruption

HOTFIXUpdate SINEC NMS to version 4.0 or later
HARDENINGPlace SINEC NMS behind a firewall and isolate its network segment from business networks (DMZ or dedicated management network)
HARDENINGIf remote access to SINEC NMS is required, implement VPN with multi-factor authentication and restrict to named users
View full CISA ICS-CERT advisory
API: /api/v1/advisories/b5bd0a26-e679-411d-85b8-522feb91a279

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