CVE-2026-86392 in PowerProtect Data Domain
Summary
by MITRE • 10/28/2026
Dell PowerProtect Data Domain, Feature Release versions 7.7.1.0 through 8.8, LTS2024 release versions 7.13.1.0 through 7.13.1.80, LTS2025 release versions 8.3.1.0 through 8.3.1.40, LTS2026 release versions 8.6.1.0 through 8.6.1.20, contain a Heap-based Buffer Overflow vulnerability. A high privileged attacker with remote access could potentially exploit this vulnerability, leading to Denial of service.
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Analysis
by VulDB Data Team • 10/28/2026
The identified security flaw resides within the Dell PowerProtect Data Domain software ecosystem, specifically affecting Feature Release versions 7.7.1.0 through 8.8, LTS2024 release versions 7.13.1.0 through 7.13.1.80, LTS2025 release versions 8.3.1.0 through 8.3.1.40, and LTS2026 release versions 8.6.1.0 through 8.6.1.20. This vulnerability is classified as a heap-based buffer overflow, which represents a critical memory management error where the program writes data beyond the allocated boundaries of a dynamically allocated block on the heap. Such flaws typically arise from insufficient validation of input parameters or improper handling of variable-length strings and binary data structures during processing operations within the application logic. The presence of this vulnerability indicates that specific code paths fail to correctly calculate buffer sizes or enforce strict length checks before copying user-supplied or network-received data into memory buffers, allowing an attacker to overwrite adjacent memory locations with arbitrary content.
From a technical perspective, heap-based overflows are particularly dangerous because they can corrupt internal data structures used by the application runtime environment, such as allocation metadata pointers or function return addresses stored on the stack if control flow is redirected. In this specific instance, while the primary documented impact is limited to denial of service, the underlying mechanism poses a significant risk for potential code execution under different exploitation conditions. The vulnerability allows an attacker with high privileges and remote access capabilities to trigger the overflow by sending specially crafted requests or data packets that exceed expected buffer limits. When the application attempts to process these malformed inputs, it writes beyond the allocated heap space, leading to memory corruption that destabilizes the software environment. This instability manifests as a crash of the affected service or the entire system, resulting in an immediate denial of service condition where legitimate users are unable to access backup and recovery services provided by the Data Domain appliance.
The operational impact of this vulnerability is severe for organizations relying on Dell PowerProtect Data Domain for critical data protection workflows. Since exploitation requires high-privileged remote access, it suggests that the attack vector targets authenticated administrative interfaces or internal management protocols rather than unauthenticated external endpoints. However, if an attacker gains elevated privileges through other means such as credential theft, social engineering, or lateral movement within a compromised network segment, they can leverage this flaw to disrupt backup operations indefinitely. The denial of service effect halts data replication and snapshot creation processes, potentially leading to significant downtime in disaster recovery capabilities and violating strict retention policies mandated by regulatory compliance frameworks like GDPR, HIPAA, or SOX. Furthermore, the instability caused by memory corruption may lead to unpredictable behavior beyond simple crashes, including silent data corruption if the overflow affects critical database structures used for metadata management within the storage system.
Mitigation strategies must focus on both immediate remediation and long-term hardening of the environment. The primary defense is to apply the vendor-provided software patches or updates that address this specific heap-based buffer overflow vulnerability as soon as possible, ensuring all affected version ranges are upgraded to their respective secure releases. In addition to patching, organizations should enforce strict network segmentation policies to limit remote administrative access to trusted management networks only, utilizing multi-factor authentication and strong credential hygiene practices to prevent unauthorized high-privileged logins that could trigger the exploit. Network intrusion detection systems should be configured with signatures capable of identifying anomalous memory allocation patterns or malformed packet structures associated with buffer overflow attempts. Regular vulnerability scanning and penetration testing focused on authenticated administrative interfaces will help identify any residual exposure, while maintaining comprehensive logging and monitoring ensures rapid detection of any attempted exploitation activities that might lead to service disruption.