Siemens SINEC INS

Summary

Siemens has released an update for its SINEC INS product, addressing multiple critical vulnerabilities. These include OS command injection, path traversal, execution with unnecessary privileges, and weak password hashing. The affected versions are SINEC INS before V1.0 SP2 Update 6. Exploitation could lead to arbitrary command execution, unauthorized file access, privilege escalation, and password recovery.

Full text

ICS Advisory Siemens SINEC INS Release DateJune 23, 2026 Alert CodeICSA-26-174-04 Related topics: Industrial Control System Vulnerabilities , Industrial Control Systems View CSAF Summary SINEC INS before V1.0 SP2 Update 6 is affected by multiple vulnerabilities. Siemens has released a new version for SINEC INS and recommends to update to the latest version. The following versions of Siemens SINEC INS are affected: SINEC INS vers:intdot/<1.0.2.6 CVSS Vendor Equipment Vulnerabilities v3 8.8 Siemens Siemens SINEC INS Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection'), Path Traversal: '/dir/../filename', Execution with Unnecessary Privileges, Use of a One-Way Hash with a Predictable Salt Background Critical Infrastructure Sectors: Critical Manufacturing, Transportation Systems, Energy, Healthcare and Public Health, Financial Services, Government Services and Facilities Countries/Areas Deployed: Worldwide Company Headquarters Location: Germany Vulnerabilities Expand All + CVE-2026-46746 The application does not properly sanitize user input in the /api/sftp/uploadFiles endpoint, allowing the injection of shell command payloads via crafted directory names. These payloads are stored and executed when directory listings are retrieved. This could allow an authenticated remote attacker to execute arbitrary commands on the underlying operating system with the privileges of the affected service user (sinecins). View CVE Details Affected Products Siemens SINEC INS Vendor:Siemens Product Version:SINEC INS Product Status:known_affected Remediations Vendor fixUpdate to V1.0 SP2 Update 6 or later versionhttps://support.industry.siemens.com/cs/ww/en/view/110002283/ Relevant CWE: CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') Metrics CVSS Version Base Score Base Severity Vector String 3.1 8.8 HIGH CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2026-46747 The affected application does not properly sanitize path input in the `GET /api/sftp/uploadFiles` endpoint used for directory listing. This allows path traversal through crafted input, enabling access to unintended file system locations. View CVE Details Affected Products Siemens SINEC INS Vendor:Siemens Product Version:SINEC INS Product Status:known_affected Remediations Vendor fixUpdate to V1.0 SP2 Update 6 or later versionhttps://support.industry.siemens.com/cs/ww/en/view/110002283/ Relevant CWE: CWE-26 Path Traversal: '/dir/../filename' Metrics CVSS Version Base Score Base Severity Vector String 3.1 4.3 MEDIUM CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N CVE-2026-46748 The affected system includes a binary that is configured with the cap_dac_override capability. This capability allows the process to bypass file system permission checks, resulting in unrestricted file system access. This could allow a local attacker to escalate privileges leading to arbitrary file modification and gaining root privileges on the system. View CVE Details Affected Products Siemens SINEC INS Vendor:Siemens Product Version:SINEC INS Product Status:known_affected Remediations Vendor fixUpdate to V1.0 SP2 Update 6 or later versionhttps://support.industry.siemens.com/cs/ww/en/view/110002283/ Relevant CWE: CWE-250 Execution with Unnecessary Privileges Metrics CVSS Version Base Score Base Severity Vector String 3.1 8.8 HIGH CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2026-46749 The affected application uses a password hashing implementation with a static, hardcoded salt shared across all users and installations, and is configured with an insufficient number of iterations. This could allow an attacker to efficiently recover user passwords using brute-force or precomputed attacks, potentially resulting in unauthorized access. View CVE Details Affected Products Siemens SINEC INS Vendor:Siemens Product Version:SINEC INS Product Status:known_affected Remediations Vendor fixUpdate to V1.0 SP2 Update 6 or later versionhttps://support.industry.siemens.com/cs/ww/en/view/110002283/ Relevant CWE: CWE-760 Use of a One-Way Hash with a Predictable Salt Metrics CVSS Version Base Score Base Severity Vector String 3.1 7.5 HIGH CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H Acknowledgments Siemens ProductCERT reported these vulnerabilities to CISA. General Recommendations As a general security measure, Siemens strongly recommends to protect network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends to configure the environment according to Siemens' operational guidelines for Industrial Security (Download: https://www.siemens.com/cert/operational-guidelines-industrial-security), and to follow the recommendations in the product manuals. Additional information on Industrial Security by Siemens can be found at: https://www.siemens.com/industrialsecurity Additional Resources For further inquiries on security vulnerabilities in Siemens products and solutions, please contact the Siemens ProductCERT: https://www.siemens.com/cert/advisories Terms of Use The use of Siemens Security Advisories is subject to the terms and conditions listed on: https://www.siemens.com/productcert/terms-of-use. Legal Notice and Terms of Use This product is provided subject to this Notification (https://www.cisa.gov/notification) and this Privacy & Use policy (https://www.cisa.gov/privacy-policy). Recommended Practices CISA recommends users take defensive measures to minimize the exploitation risk of this vulnerability. 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-860189 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 contact Siemens ProductCERT directly for any questions regarding this advisory. Revision History Initial Release Date: 2026-06-09 Date Revision Summary 2026-06-09 1 Publication Date 2026-06-23 2 Initial CISA Republication of Siemens ProductCERT SSA-860189 advisory Legal Notice and Terms of Use This product is provided subject to this Notification and this Privacy & Use policy. Vendor Siemens Tags Sector:

Indicators of Compromise

• cve — CVE-2026-46746
• cve — CVE-2026-46747
• cve — CVE-2026-46748
• cve — CVE-2026-46749

Entities