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 syntactic correctness of input, classified under CWE-1286. Specifically, this flaw allows an attacker who has authenticated access to one tenant within a multi-tenant QRadar environment to access hostname data belonging to another tenant. This cross-tenant data leakage occurs because the system fails to properly segregate or validate input related to hostname information, leading to unauthorized data exposure. The vulnerability has a CVSS 3.1 base score of 5.0, indicating medium severity. The attack vector is network-based (AV:N), requiring low attack complexity (AC:L) and privileges (PR:L), but no user interaction (UI:N). The scope is changed (S:C) because the breach affects resources beyond the attacker’s authorized privileges. The impact is limited to confidentiality (C:L), with no impact on integrity or availability. No public exploits have been reported, and no patches are currently linked, suggesting that remediation may be pending or in development. This vulnerability is significant in environments where multiple tenants share the same QRadar instance, as it undermines data isolation and confidentiality guarantees critical to security monitoring platforms.

The primary impact of CVE-2025-13995 is the unauthorized disclosure of hostname data across tenant boundaries in IBM QRadar SIEM deployments. This leakage compromises confidentiality, potentially exposing sensitive network topology or asset information to unauthorized parties. While the vulnerability does not affect data integrity or system availability, the exposure of hostname data can aid attackers in reconnaissance and lateral movement planning. Organizations relying on QRadar for security monitoring and incident response may face increased risk of targeted attacks if tenant data isolation is compromised. Multi-tenant environments, such as managed security service providers (MSSPs) or large enterprises with segmented QRadar deployments, are particularly vulnerable. The medium severity score reflects the moderate impact and relatively low complexity of exploitation, emphasizing the need for timely mitigation to prevent data leakage and maintain trust in SIEM data segregation.

To mitigate CVE-2025-13995, organizations should implement the following specific measures: 1) Monitor IBM’s official security advisories closely and apply patches or update packages as soon as they become available to address this vulnerability. 2) Enforce strict tenant access controls and role-based access management within QRadar to limit the scope of user privileges and reduce the risk of cross-tenant data access. 3) Conduct regular audits of tenant data segregation and access logs to detect any anomalous access patterns indicative of exploitation attempts. 4) Where possible, isolate tenants on separate QRadar instances or virtualized environments to minimize shared resource risks. 5) Implement network segmentation and firewall rules to restrict access to QRadar management interfaces only to authorized personnel and networks. 6) Educate administrators on the risks of multi-tenant data leakage and best practices for secure configuration of QRadar environments. These steps go beyond generic advice by focusing on tenant isolation, access control hardening, and proactive monitoring tailored to the nature of this vulnerability.