CVE-2025-13995 is a vulnerability identified in IBM QRadar Security Information and Event Management (SIEM) software versions 7.5.0 through 7.5.0 Update Package 14. The root cause is improper validation of the syntactic correctness of input data, classified under CWE-1286. This flaw allows an attacker who has legitimate access to one tenant within a multi-tenant QRadar environment to access hostname data associated with other tenants. The vulnerability arises due to insufficient input validation mechanisms that fail to enforce strict tenant data segregation, leading to cross-tenant data leakage. The CVSS 3.1 base score is 5.0, indicating medium severity, with an attack vector of network (AV:N), low attack complexity (AC:L), requiring privileges (PR:L), no user interaction (UI:N), and a scope change (S:C) because the vulnerability affects resources beyond the attacker’s privileges. The impact is limited to confidentiality loss of hostname information; integrity and availability remain unaffected. No known exploits have been reported in the wild, and IBM has not yet published patches or mitigation instructions. This vulnerability is particularly relevant for organizations operating multi-tenant QRadar deployments, where tenant isolation is critical to maintaining data confidentiality.

The primary impact of CVE-2025-13995 is the unauthorized disclosure of hostname data across tenant boundaries in IBM QRadar SIEM environments. This confidentiality breach can expose sensitive network topology information, potentially aiding attackers in reconnaissance and subsequent targeted attacks. While the vulnerability does not allow modification or disruption of services, the leakage of hostname data can undermine trust in multi-tenant environments and violate compliance requirements related to data segregation and privacy. Organizations relying on QRadar for security monitoring may face increased risk of lateral movement by malicious insiders or compromised tenants. The scope of affected systems is limited to QRadar 7.5.0 through 7.5.0 Update Package 14, but given QRadar’s widespread use in government, financial, and critical infrastructure sectors, the impact could be significant in sensitive environments.

To mitigate CVE-2025-13995, organizations should first verify whether their QRadar deployments are running affected versions (7.5.0 through 7.5.0 Update Package 14). Until IBM releases an official patch, administrators should enforce strict tenant access controls and audit tenant data access logs for unusual cross-tenant queries. Network segmentation and zero-trust principles should be applied to limit tenant access scopes. Additionally, consider deploying compensating controls such as enhanced monitoring for anomalous data access patterns and restricting administrative privileges to trusted personnel only. Organizations should subscribe to IBM security advisories to promptly apply patches once available. For new deployments, upgrading to later QRadar versions with improved tenant isolation is recommended. Finally, conduct regular security assessments and penetration testing focused on multi-tenant isolation to detect similar vulnerabilities proactively.