Siemens WinCC Certificate Manager

View CSAF Summary WinCC Certificate Manager insufficiently protects key material that could allow an attacker to extract sensitive information. Siemens has released a new version for SIMATIC WinCC Unified PC Runtime V21 and recommends to update to the latest version. Siemens recommends specific countermeasures for products where fixes are not, or not yet available. The following versions of Siemens WinCC Certificate Manager are affected: SIMATIC WinCC Unified PC Runtime V16 vers:all/* SIMATIC WinCC Unified PC Runtime V17 vers:all/* SIMATIC WinCC Unified PC Runtime V18 vers:all/* SIMATIC WinCC Unified PC Runtime V19 vers:all/* SIMATIC WinCC Unified PC Runtime V20 vers:all/* SIMATIC WinCC Unified PC Runtime V21 vers:intdot/<21.0.2 CVSS Vendor Equipment Vulnerabilities v3 7.1 Siemens Siemens WinCC Certificate Manager Cleartext Storage in a File or on Disk 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-2026-24349 Insufficient protection of key material in WinCC Certificate Manager that could allow an attacker to extract sensitive information. View CVE Details Affected Products Siemens WinCC Certificate Manager Vendor: Siemens Product Version: SIMATIC WinCC Unified PC Runtime V16, SIMATIC WinCC Unified PC Runtime V17, SIMATIC WinCC Unified PC Runtime V18, SIMATIC WinCC Unified PC Runtime V19, SIMATIC WinCC Unified PC Runtime V20, SIMATIC WinCC Unified PC Runtime V21 Product Status: known_affected Remediations Mitigation The affected product may be operated only by personnel qualified for the specific task in accordance with the relevant documentation, in particular its warning notices and safety instructions. Qualified personnel are those who, based on their training and experience, are capable of identifying risks and avoiding potential hazards when working with the affected product. No fix planned Currently no fix is planned Vendor fix Update to V21 Update 2 or later version https://support.industry.siemens.com/cs/ww/en/view/109991140/ Relevant CWE: CWE-313 Cleartext Storage in a File or on Disk Metrics CVSS Version Base Score Base Severity Vector String 3.1 7.1 HIGH CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N Acknowledgments Siemens ProductCERT reported this vulnerability 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 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,