CVE-2025-36258 identifies a vulnerability in IBM InfoSphere Information Server versions 11.7.0.0 through 11.7.1.6, where user credentials and other sensitive data are stored in plaintext on the local file system. This vulnerability is categorized under CWE-256, which concerns the plaintext storage of passwords. The flaw allows any local user, without requiring privileges or user interaction, to access sensitive credentials directly from the file system. The vulnerability does not require authentication or elevated privileges, making it easier to exploit in multi-user environments or where local access controls are insufficient. The CVSS 3.1 vector (AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N) indicates that the attack vector is local, with low attack complexity, no privileges required, no user interaction, and a scope change due to potential credential compromise affecting other components. The impact is primarily on confidentiality, as attackers can obtain plaintext credentials, potentially enabling lateral movement or further compromise within the network. Although no exploits have been reported in the wild yet, the vulnerability poses a significant risk to organizations relying on IBM InfoSphere for data integration and analytics. IBM has not yet released patches, so mitigation currently relies on restricting local access and monitoring for suspicious activity.

The primary impact of CVE-2025-36258 is the compromise of confidentiality due to plaintext storage of sensitive credentials. An attacker with local access can easily retrieve user passwords, which may allow unauthorized access to the InfoSphere environment and potentially other connected systems if credentials are reused. This can lead to lateral movement, data exfiltration, and further compromise of enterprise data integration workflows. The vulnerability does not affect system integrity or availability directly but can indirectly facilitate more severe attacks. Organizations with multiple users on shared systems or weak local access controls are at higher risk. The scope of affected systems is limited to IBM InfoSphere Information Server versions 11.7.0.0 through 11.7.1.6, but given the product's use in critical data processing environments, the impact can be significant. The lack of required privileges or user interaction lowers the barrier for exploitation, increasing the risk in environments where local access is not tightly controlled.

1. Immediately restrict local access to systems running IBM InfoSphere Information Server to trusted administrators only, using strict access control policies and monitoring. 2. Implement file system permissions to limit read access to credential storage locations, ensuring only necessary service accounts or administrators can access these files. 3. Monitor local system logs and user activity for unusual access patterns or attempts to read sensitive files. 4. Use host-based intrusion detection systems (HIDS) to detect unauthorized file access attempts. 5. Enforce strong credential management policies, including unique passwords and regular rotation, to reduce the impact of credential exposure. 6. Segregate critical systems and limit network access to reduce the risk of lateral movement if credentials are compromised. 7. Stay updated with IBM security advisories and apply patches or updates as soon as they become available. 8. Consider encrypting sensitive configuration files or credentials at rest using third-party tools or OS-level encryption until an official fix is released. 9. Conduct regular security audits and penetration testing focusing on local privilege escalation and credential exposure risks.