View CSAF Summary The SICAM SIAPP SDK contains multiple vulnerabilities that could allow an attacker to disrupt the customer-developed SIAPP or its simulation environment. Potential impacts include denial of service within the SIAPP, corruption of SIAPP data, or exploit the simulation environment. These vulnerabilities are only exploitable if the API is used improperly or hardening measures are not applied. Siemens has released a new version for SICAM SIAPP SDK and recommends to update to the latest version. The following versions of Siemens SICAM SIAPP SDK are affected: SICAM SIAPP SDK vers:intdot/<2.1.7 CVSS Vendor Equipment Vulnerabilities v3 7.4 Siemens Siemens SICAM SIAPP SDK Out-of-bounds Write, Stack-based Buffer Overflow, Improper Handling of Length Parameter Inconsistency, External Control of File Name or Path Background Critical Infrastructure Sectors: Critical Manufacturing Countries/Areas Deployed: Worldwide Company Headquarters Location: Germany Vulnerabilities Expand All + CVE-2026-25569 An out-of-bounds write vulnerability exists in SICAM SIAPP SDK. This could allow an attacker to write data beyond the intended buffer, potentially leading to denial of service, or arbitrary code execution. View CVE Details Affected Products Siemens SICAM SIAPP SDK Vendor:Siemens Product Version:SICAM SIAPP SDK Product Status:known_affected Remediations Vendor fixUpdate to V2.1.7 or later Relevant CWE: CWE-787 Out-of-bounds Write Metrics CVSS Version Base Score Base Severity Vector String 3.1 7.4 HIGH CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVE-2026-25570 The SICAM SIAPP SDK does not perform checks on input values potentially resulting in stack overflow. This could allow an attacker to perform code execution and denial of service. View CVE Details Affected Products Siemens SICAM SIAPP SDK Vendor:Siemens Product Version:SICAM SIAPP SDK Product Status:known_affected Remediations Vendor fixUpdate to V2.1.7 or later Relevant CWE: CWE-121 Stack-based Buffer Overflow Metrics CVSS Version Base Score Base Severity Vector String 3.1 7.4 HIGH CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVE-2026-25571 The SICAM SIAPP SDK client component does not enforce maximum length checks on certain variables before use. This could allow an attacker to send an oversized input that could trigger a stack overflow crashing the process and potentially causing denial of service. View CVE Details Affected Products Siemens SICAM SIAPP SDK Vendor:Siemens Product Version:SICAM SIAPP SDK Product Status:known_affected Remediations Vendor fixUpdate to V2.1.7 or later Relevant CWE: CWE-130 Improper Handling of Length Parameter Inconsistency Metrics CVSS Version Base Score Base Severity Vector String 3.1 5.1 MEDIUM CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H CVE-2026-25572 The SICAM SIAPP SDK server component does not enforce maximum length checks on certain variables before use. This could allow an attacker to send an oversized input that could trigger a stack overflow crashing the process and potentially causing denial of service. View CVE Details Affected Products Siemens SICAM SIAPP SDK Vendor:Siemens Product Version:SICAM SIAPP SDK Product Status:known_affected Remediations Vendor fixUpdate to V2.1.7 or later Relevant CWE: CWE-130 Improper Handling of Length Parameter Inconsistency Metrics CVSS Version Base Score Base Severity Vector String 3.1 5.1 MEDIUM CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H CVE-2026-25573 The affected application builds shell commands with caller-provided strings and executes them. An attacker could influence the executed command, potentially resulting in command injection and full system compromise. View CVE Details Affected Products Siemens SICAM SIAPP SDK Vendor:Siemens Product Version:SICAM SIAPP SDK Product Status:known_affected Remediations Vendor fixUpdate to V2.1.7 or later Relevant CWE: CWE-73 External Control of File Name or Path Metrics CVSS Version Base Score Base Severity Vector String 3.1 7.4 HIGH CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVE-2026-25605 The affected application performs file deletion without properly validating the file path or target. An attacker could delete files or sockets that the affected process has permission to remove, potentially resulting in denial of service or service disruption. View CVE Details Affected Products Siemens SICAM SIAPP SDK Vendor:Siemens Product Version:SICAM SIAPP SDK Product Status:known_affected Remediations Vendor fixUpdate to V2.1.7 or later Relevant CWE: CWE-73 External Control of File Name or Path Metrics CVSS Version Base Score Base Severity Vector String 3.1 6.7 MEDIUM CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H Acknowledgments Siemens ProductCERT reported these vulnerabilities to CISA. Maxime Rossi Bellom of Secmate reported these vulnerabilities to Siemens. General Recommendations Operators of critical power systems (e.g. TSOs or DSOs) worldwide are usually required by regulations to build resilience into the power grids by applying multi-level redundant secondary protection schemes. It is therefore recommended that the operators check whether appropriate resilient protection measures are in place. The risk of cyber incidents impacting the grid's reliability can thus be minimized by virtue of the grid design. Siemens strongly recommends applying the provided security updates using the corresponding tooling and documented procedures made available with the product. If supported by the product, an automated means to apply the security updates across multiple product instances may be used. Siemens strongly recommends prior validation of any security update before being applied, and supervision by trained staff of the update process in the target environment. As a general security measure Siemens strongly recommends to protect network access with appropriate mechanisms (e.g. firewalls, segmentation, VPN). It is advised to configure the environment according to our operational guidelines in order to run the devices in a protected IT environment. Recommended security guidelines can be found at: https://www.siemens.com/gridsecurity 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-903736 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: 2026-03-10 Date Revision Summary 2026-03-10 1 Publication Date 2026-03-17 2 Initial CISA Republication of Siemens ProductCERT SSA-903736 advisory Legal Notice and Terms of Use