Siemens SINEC NMS
Plan Patch8.8ICS-CERT ICSA-21-287-05Oct 12, 2021
Attack VectorNetwork
Auth RequiredLow
ComplexityLow
User InteractionNone needed
Summary
SINEC NMS before v1.0 SP2 Update 1 contains multiple vulnerabilities in path traversal (CWE-22), access control (CWE-285, CWE-200), deserialization (CWE-502), and SQL injection (CWE-89). The most severe allows an authenticated remote attacker to execute arbitrary code with system privileges under certain conditions. The vulnerabilities are fixed in SINEC NMS v1.0 SP2 Update 1 and later.
What this means
What could happen
An authenticated attacker could execute arbitrary commands on the SINEC NMS server with full system privileges, potentially allowing them to alter network management functions, access sensitive infrastructure data, or disrupt monitoring and control of connected systems.
Who's at risk
Water and electric utilities running SINEC NMS for network and device management should prioritize this. SINEC NMS is Siemens' network management system often used to monitor and manage industrial devices (PLCs, switches, firewalls) in utility and manufacturing environments. Any organization using SINEC NMS for infrastructure visibility is affected.
How it could be exploited
An attacker with valid credentials to SINEC NMS can send crafted requests over HTTPS (port 443) that exploit path traversal, access control weaknesses, or deserialization flaws to achieve remote code execution with system-level privileges on the NMS server.
Prerequisites
- Valid SINEC NMS user credentials
- Network access to SINEC NMS server on port 443/TCP
- Knowledge of vulnerable code paths or exploitation techniques
remotely exploitablerequires valid credentialslow complexity exploitationaffects network management system (critical for infrastructure visibility)EPSS 2.0% (low exploit probability, but credential-gated)
Exploitability
Moderate exploit probability (EPSS 2.0%)
Affected products (1)
ProductAffected VersionsFix Status
SINEC NMS<V1.0 SP2 Update 11.0 SP2 Update 1
Remediation & Mitigation
0/4
Do now
0/1WORKAROUNDRestrict network access to SINEC NMS server (port 443/TCP) to trusted IP addresses only via firewall rules
Schedule — requires maintenance window
0/1Patching may require device reboot — plan for process interruption
HOTFIXUpdate SINEC NMS to version 1.0 SP2 Update 1 or later
Long-term hardening
0/2HARDENINGIsolate SINEC NMS network and connected devices behind firewalls, separate from business network
HARDENINGEnsure SINEC NMS is not accessible from the Internet; use VPN with secure authentication for remote access if required
CVEs (15)
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API:
/api/v1/advisories/cdc2c47c-1bad-4392-bda5-1a600de4e463