Siemens Siveillance Control

A vulnerability has been identified in the Open Interface Services (OIS) web module affecting Siveillance Control and Siveillance Control Pro (versions OIS 3.x.y and OIS 4.x.y) . This vulnerability allows an attacker to upload arbitrary files, which can lead to unauthorized root-level access on the OIS server. Siemens has released patches and updates for Siveillance OIS to apply to the products that incorporate the OIS service, and recommends to update to the latest versions.

The following versions of Siemens Siveillance Control are affected:

Siveillance Control Pro V3.0 vers:intdot/<3.0.12.2173 (CVE-2026-50093)

Siveillance Control Pro V4.0 vers:intdot/<4.0.9.2178 (CVE-2026-50093)

Siveillance Control V3.0 vers:intdot/<3.0.22.2177 (CVE-2026-50093)

Siveillance Control V4.0 vers:intdot/<4.0.11.2177 (CVE-2026-50093)

Critical Infrastructure Sectors: Critical Manufacturing, Communications, Commercial Facilities

Countries/Areas Deployed: Worldwide

Company Headquarters Location: Germany

A vulnerability in the OIS web module allows an attacker to upload arbitrary files to the server. Successful exploitation of this vulnerability could allow an attacker to gain root access on the host system, potentially leading to a full compromise of the affected OIS environment.

Vendor fix Update to V3.0.12.2173 or later version

Vendor fix Update to V3.0.22.2177 or later version

Vendor fix Update to V4.0.11.2177 or later version

Vendor fix Update to V4.0.9.2178 or later version

Vendor fix For more information see the associated Siemens security advisory SSA-254516: Arbitrary File Upload in OIS Web Module - CSAF Version , SSA-254516: Arbitrary File Upload in OIS Web Module - HTML Version .

Relevant CWE: CWE-434 Unrestricted Upload of File with Dangerous Type

Siemens ProductCERT reported this vulnerability to CISA.

General Recommendations

As a general security measure Siemens strongly recommends to protect network access to affected products with appropriate mechanisms. It is advised to follow recommended security practices in order to run the devices in a protected IT environment.

For further inquiries on security vulnerabilities in Siemens products and solutions, please the Siemens ProductCERT:

The use of Siemens Security Advisories is subject to the terms and conditions listed on: .

Legal Notice and Terms of Use

This product is provided subject to this Notification ( ) and this Privacy & Use policy ( ).

Recommended Practices

CISA recommends users take defensive measures to minimize the exploitation risk of these vulnerabilities.

Minimize network exposure for all control system devices and/or systems, and ensure they are not accessible from the internet.

Locate control system networks and remote devices behind firewalls and isolate them from business networks.

When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most recent version available. Also recognize VPN is only as secure as its connected devices.

CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.

CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.

CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets. Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov in the technical information paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies.

Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.

Advisory Conversion Disclaimer

This ICSA is a verbatim republication of Siemens ProductCERT SSA-254516 from a direct conversion of the vendor's Common Security Advisory Framework (CSAF) advisory. This is republished to CISA's website as a means of increasing visibility and is provided "as-is" for informational purposes only. CISA is not responsible for the editorial or technical accuracy of republished advisories and provides no warranties of any kind regarding any information contained within this advisory. Further, CISA does not endorse any commercial product or service. Please Siemens ProductCERT directly for any questions regarding this advisory.

Initial Release Date: 2026-09-08

Legal Notice and Terms of Use

This product is provided subject to this Notification and this Privacy & Use policy.