CVE-2026-90729 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 remote 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 tracks including Feature Releases 7.7.1.0 through 8.7 and specific Long Term Support releases for the years 2024, 2025, and 2026. This vulnerability is classified as an Improper Privilege Management issue which fundamentally undermines the system's ability to enforce access control policies correctly. The core technical flaw involves a failure in the application logic that governs role-based permissions or privilege escalation checks within the management interface or underlying operating services. When this check fails, it allows actions intended for lower-privileged users or restricted operational contexts to be executed with elevated authority without proper validation of the user's actual rights level.
The primary risk associated with this vulnerability is the potential for Elevation of Privileges by an attacker who already possesses remote access and high-level credentials. While the initial entry point requires a compromised account with significant existing privileges, the exploitation path allows that actor to bypass additional security controls or gain administrative control over components they should not be able to modify. This could involve modifying system configurations, accessing sensitive backup data stored on the appliance, disabling logging mechanisms, or installing malicious software within the management plane. The impact is severe because it compromises the integrity and confidentiality of the entire data protection infrastructure managed by the PowerProtect Data Domain unit.
From a classification perspective this vulnerability aligns with CWE-269 which denotes Improper Privilege Management where an actor performs an action beyond their designated permissions. In terms of adversary behavior, this flaw facilitates techniques described in the MITRE ATT&CK framework such as T1078 Valid Accounts and potentially T1068 Exploitation for Privilege Escalation depending on how the privilege boundary is crossed. The vulnerability highlights a critical gap in defense-in-depth strategies where reliance on initial authentication credentials alone does not guarantee that subsequent actions are properly authorized by the system's internal security engine.
Mitigation requires immediate attention to patch management protocols within the organization. Dell has released updates for all affected versions listed which address the underlying logic errors responsible for the privilege bypass. Administrators should verify their current software version against the provided ranges and apply the latest available patches from official support channels. In addition to applying vendor-supplied fixes, organizations should enforce strict network segmentation policies to limit remote access to management interfaces only through secure, authenticated tunnels such as VPNs or bastion hosts. Implementing multi-factor authentication for all administrative accounts adds a critical layer of defense that can prevent initial compromise even if credential theft occurs further reducing the likelihood of an attacker reaching the stage where they could exploit this privilege escalation flaw. Regular auditing of user roles and permissions ensures that no single account holds excessive privileges beyond what is strictly necessary for its function thereby minimizing the blast radius should any vulnerability be exploited in the future.