CVE-2026-86393 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 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 • 10/28/2026
The identified security flaw resides within Dell PowerProtect Data Domain systems across multiple software release tracks including Feature Releases 7.7.1.0 through 8.8 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 access control mechanisms designed to restrict user actions based on their assigned roles. The core technical flaw involves a failure in the system to correctly validate or enforce privilege boundaries during specific operational sequences, allowing a user with existing high-level privileges to execute commands or access resources that should be restricted even to them under normal security policies. This misconfiguration creates an avenue for attackers who have already gained remote access using elevated credentials to further escalate their rights beyond what is intended by the system architecture.
From a technical perspective, this vulnerability aligns closely with CWE-269 which denotes Improper Privilege Management and often overlaps with CWE-250 regarding execution without required privileges if the escalation allows actions outside the user's designated scope. The attack vector requires an attacker to possess remote access capabilities along with high-level administrative credentials initially. This prerequisite means that while the vulnerability enables privilege elevation, it does not provide initial entry into the system but rather amplifies the impact of a compromised account. Once exploited, the attacker can bypass security controls intended for standard administrators or service accounts, potentially gaining root level access or control over critical storage management functions.
The operational impact of this flaw is significant because PowerProtect Data Domain systems are central to enterprise data protection strategies and often hold immutable copies of critical organizational data. An adversary achieving elevated privileges through this vulnerability could manipulate backup schedules, alter retention policies, delete protected snapshots, or exfiltrate sensitive information with greater ease than a standard administrator would be permitted. This escalation compromises the integrity and availability guarantees that these systems are designed to provide. In environments where ransomware defense relies on immutable backups, an attacker gaining full administrative control can disable protection mechanisms before encrypting primary data sources, thereby rendering recovery efforts ineffective.
Mitigation strategies primarily involve applying the vendor-provided software patches or updates that address this specific privilege management logic error immediately upon availability. Organizations should also enforce strict network segmentation to limit remote access to these systems only from trusted management networks and utilize multi-factor authentication for all administrative accounts to reduce the risk of credential compromise. Regular auditing of user roles and permissions is essential to ensure that high-privileged accounts are used sparingly and monitored closely for anomalous behavior consistent with privilege escalation attempts. Aligning security operations with ATT&CK techniques such as T1078 Valid Accounts and T1068 Exploitation for Privilege Escalation can help in detecting potential exploitation activities through behavioral analytics and log monitoring.