CVE-2026-25605 is a vulnerability classified under CWE-73 (External Control of File Name or Path) affecting Siemens SICAM SIAPP SDK versions earlier than 2.1.7. The root cause is the SDK's failure to properly validate file paths or targets before performing file deletion operations. This flaw allows an attacker with local access to specify arbitrary file paths for deletion, enabling the removal of files or sockets that the affected process has permission to delete. The vulnerability does not require authentication or user interaction but has a high attack complexity, indicating that exploitation is non-trivial and likely requires specific conditions or knowledge. The CVSS v3.1 score is 6.7, reflecting medium severity, with impact on integrity and availability but no confidentiality loss. Exploiting this vulnerability can lead to denial of service or disruption of services by deleting critical files or IPC sockets used by the application or system. No patches have been released yet, and no known exploits have been observed in the wild. The vulnerability is particularly relevant for industrial control systems and critical infrastructure environments where SICAM SIAPP SDK is deployed, as disruption could affect operational continuity.

The primary impact of CVE-2026-25605 is the potential for denial of service or service disruption through unauthorized deletion of files or sockets by an attacker. This can compromise the integrity and availability of affected systems, potentially interrupting industrial control processes or critical infrastructure operations that rely on the SICAM SIAPP SDK. Since the vulnerability requires local access and has high attack complexity, remote exploitation is unlikely without prior system compromise. However, once exploited, it could facilitate further attacks or operational failures. Organizations operating Siemens SICAM SIAPP SDK in industrial environments may face operational downtime, loss of control system functionality, and increased recovery costs. The absence of confidentiality impact reduces risks related to data leakage but does not diminish the operational threat posed by service disruption.

1. Upgrade to Siemens SICAM SIAPP SDK version 2.1.7 or later once the patch is released to ensure the vulnerability is fully remediated. 2. Until a patch is available, restrict local access to systems running the affected SDK to trusted personnel only, minimizing the risk of exploitation. 3. Implement strict file system permissions and access controls to limit the ability of processes and users to delete critical files or sockets. 4. Monitor system logs and file system activity for unusual or unauthorized file deletion attempts, especially targeting files related to SICAM SIAPP SDK operations. 5. Employ application whitelisting and integrity monitoring tools to detect and prevent unauthorized modifications or deletions. 6. Conduct regular security audits and vulnerability assessments focusing on industrial control system components to identify and mitigate similar risks. 7. Develop and test incident response plans to quickly recover from potential denial of service incidents caused by file deletion.