CVE-2026-90728 in PowerProtect Data Domain
Summary
by MITRE • 10/27/2026
Dell PowerProtect Data Domain, Feature Release versions 7.7.1.0 through 8.7, 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 an Improper Privilege Management vulnerability. A high privileged attacker with local access could potentially exploit this vulnerability, leading to elevation of privileges.
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Analysis
by VulDB Data Team • 10/27/2026
The identified security flaw resides within Dell PowerProtect Data Domain systems across multiple software release branches, specifically affecting Feature Release versions 7.7.1.0 through 8.7, LTS2024 releases from 7.13.1.0 to 7.13.1.80, LTS2025 releases from 8.3.1.0 to 8.3.1.40, and LTS2026 releases from 8.6.1.0 to 8.6.1.20. This vulnerability is classified as an Improper Privilege Management issue, which fundamentally represents a failure in the system's ability to correctly enforce access control policies regarding user roles and permissions. In secure software architecture, privilege management ensures that processes and users operate only with the minimum privileges necessary for their intended functions. When this mechanism fails, it creates a pathway for unauthorized escalation of rights within the operating environment.
The technical nature of this flaw involves a deficiency in how the PowerProtect Data Domain OS validates or restricts specific actions based on user identity. While the vulnerability requires an attacker to possess local access and high-level privileges initially, the core issue lies in the system's inability to properly isolate these elevated rights from lower-privileged contexts or administrative boundaries that should remain restricted. This misconfiguration allows a process running under a high-privilege account to inadvertently execute commands or modify configurations that bypass intended security controls. The flaw does not necessarily stem from an external network exploit but rather from internal logic errors in privilege handling, such as improper checks before executing system-level operations or failing to drop privileges after completing sensitive tasks.
From an operational perspective, the impact of this vulnerability is significant due to the critical role PowerProtect Data Domain plays in enterprise data protection strategies. As a primary target for ransomware and other malicious actors seeking to disrupt business continuity by encrypting or destroying backups, any compromise that leads to privilege escalation poses severe risks. An attacker who successfully exploits this flaw could gain deeper control over the backup infrastructure than initially intended. This elevated access may allow them to modify backup configurations, delete critical recovery points, tamper with system logs to cover their tracks, or potentially pivot further into other connected network segments if additional lateral movement vectors exist. The ability to escalate privileges locally undermines the integrity and availability guarantees that data protection appliances are designed to provide.
This vulnerability aligns closely with Common Weakness Enumeration identifier CWE-269, which describes Improper Privilege Management, where a process or user has excessive permissions relative to its intended function. Furthermore, in the context of the MITRE ATT&CK framework, this behavior is indicative of techniques related to privilege escalation and potentially defense evasion if used to manipulate audit logs. The requirement for local access means that physical security or initial network compromise leading to shell access on a high-privileged account are prerequisites for exploitation. Consequently, organizations must treat any unauthorized local login attempts as critical indicators of potential compromise given the severity of the resulting state change.
Mitigation strategies should prioritize immediate patching according to Dell’s official guidance for the affected versions. Administrators must ensure that all PowerProtect Data Domain appliances within their environment are updated to a version where this privilege management logic has been corrected and validated. In addition to software updates, strict adherence to least-privilege principles is essential. Access to administrative interfaces should be restricted to authorized personnel only, utilizing multi-factor authentication wherever supported by the platform configuration. Network segmentation plays a crucial role in limiting exposure; ensuring that backup appliances are isolated from general user networks reduces the attack surface for initial local access attempts. Regular auditing of system logs and monitoring for anomalous privilege changes can also help detect exploitation attempts early, although prevention through patching remains the most effective control against this specific flaw.