OTPulse

Siemens SINEMA Remote Connect Server

MonitorCVSS 6.5ICS-CERT ICSA-25-072-02Mar 11, 2025
Siemens
Attack path
Attack VectorNetwork
Auth RequiredLow
ComplexityLow
User InteractionNone needed
Summary

SINEMA Remote Connect Server before V3.2 SP3 is affected by multiple vulnerabilities related to improper logging (CWE-117) and missing resource release (CWE-772). An attacker with valid user credentials could exploit these to perform unauthorized actions and bypass logging controls.

What this means
What could happen
An authenticated attacker could modify settings or configurations on the SINEMA server, potentially redirecting remote access connections to unauthorized locations or disabling audit logs of their actions, reducing visibility into who accessed your remote infrastructure.
Who's at risk
Organizations operating Siemens SINEMA Remote Connect Server for remote access to industrial control system devices and remote sites. This includes water utilities, electric utilities, and other industrial facilities relying on SINEMA for secure remote engineering and maintenance access.
How it could be exploited
An attacker with valid login credentials to the SINEMA Remote Connect Server web interface could exploit improper input handling to modify server settings or resource allocation, allowing unauthorized configuration changes or log tampering without being fully audited.
Prerequisites
  • Valid user account credentials for SINEMA Remote Connect Server
  • Network access to the SINEMA server web interface (typically port 443 HTTPS)
Requires valid credentials for exploitationLow attack complexityCould enable unauthorized access redirection to attacker infrastructureImproper logging reduces incident detection capability
Exploitability
Unlikely to be exploited — EPSS score 0.4%
Affected products (1)
ProductAffected VersionsFix Status
SINEMA Remote Connect Server<V3.2 SP33.2 SP3
Remediation & Mitigation
0/4
Do now
0/2
HARDENINGRestrict network access to the SINEMA Remote Connect Server to authorized administrators only, using firewall rules to limit access to specific IP ranges or VPN
HARDENINGEnforce strong authentication on all SINEMA user accounts and disable any unnecessary accounts
Schedule — requires maintenance window
0/2

Patching may require device reboot — plan for process interruption

HOTFIXUpdate SINEMA Remote Connect Server to version 3.2 SP3 or later
HARDENINGConfigure centralized audit logging of SINEMA server changes and monitor logs for unauthorized configuration modifications
View full CISA ICS-CERT advisory
API: /api/v1/advisories/4d21a5b6-d308-461f-8a7e-84219862ca49

Get OT security insights every Tuesday

Advisory breakdowns, a weekly summary, and incident analyses for the people actually defending OT environments. Free, no account required.