CVE-2025-62476 is a vulnerability identified in Oracle ZFS Storage Appliance Kit version 8.8, specifically within the Remote Replication component. The flaw allows an attacker who already has high-level privileges and network access via HTTP to cause the appliance to hang or crash repeatedly, resulting in a denial of service (DoS) condition. The vulnerability is classified under CWE-400, indicating it involves uncontrolled resource consumption leading to service disruption. The CVSS 3.1 base score is 4.9, reflecting a medium severity primarily due to its impact on availability. The attack vector is network-based (AV:N), with low attack complexity (AC:L), but requires high privileges (PR:H) and no user interaction (UI:N). The scope remains unchanged (S:U), and there is no impact on confidentiality or integrity, only availability (A:H). No known exploits have been reported in the wild, and no patches have been released at the time of publication. The vulnerability could be exploited by an insider or a compromised administrator account to disrupt storage services, potentially affecting data replication and availability of critical storage infrastructure.

For European organizations, the primary impact of this vulnerability is on the availability of storage services provided by Oracle ZFS Storage Appliance Kit. Disruption of storage appliances can lead to downtime of critical applications, loss of access to replicated data, and interruption of business continuity. Organizations relying on Oracle ZFS for backup, disaster recovery, or primary storage may experience operational delays and increased recovery times. Although confidentiality and integrity are not directly affected, the denial of service could indirectly impact data availability and business operations. Sectors such as finance, healthcare, telecommunications, and government agencies that depend on high availability storage solutions are particularly vulnerable. The requirement for high privileges limits the risk of external attackers exploiting this vulnerability without prior access, but insider threats or compromised administrative accounts pose a significant risk. The lack of patches increases the urgency for interim mitigations to prevent exploitation.

1. Restrict network access to the Oracle ZFS Storage Appliance management interfaces, especially HTTP access, using firewalls and network segmentation to limit exposure to trusted administrators only. 2. Enforce strict access controls and multi-factor authentication for all high privileged accounts to reduce the risk of credential compromise. 3. Monitor logs and network traffic for unusual activity related to the Remote Replication component or repeated crash/hang symptoms. 4. Implement robust insider threat detection mechanisms to identify potential misuse of privileged accounts. 5. Prepare for rapid deployment of patches or updates once Oracle releases a fix for this vulnerability. 6. Consider temporary disabling or limiting the Remote Replication feature if feasible and if it reduces exposure. 7. Conduct regular backups and ensure disaster recovery plans are tested to mitigate potential downtime caused by exploitation. 8. Engage with Oracle support to receive timely updates and guidance on this vulnerability.