CVE-2026-86355 in PowerStore
Summary
by MITRE • 11/13/2026
Dell PowerStore contains an External Control of File Name or Path vulnerability. A remote authenticated attacker could exploit this vulnerability, potentially leading to privilege escalation on the appliance.
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Analysis
by VulDB Data Team • 11/13/2026
The identified vulnerability in Dell PowerStore represents a critical security flaw classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory, commonly known as path traversal or directory traversal. This category of vulnerabilities arises when an application accepts user-supplied input that is used to construct file paths without sufficiently validating or sanitizing the data. In the context of Dell PowerStore, this flaw allows for external control over file names or paths, which can be leveraged by attackers to access files and directories outside of the intended restricted scope. The presence of such a vulnerability indicates a failure in input validation mechanisms that are designed to ensure that operations remain confined within specific application boundaries.
A remote authenticated attacker is capable of exploiting this weakness through carefully crafted requests sent to the appliance's management interface or API endpoints. Authentication requirements suggest that while the attack surface is somewhat limited compared to unauthenticated vulnerabilities, it still poses a significant risk because legitimate users with lower privileges may possess sufficient access rights to trigger specific functions within the system. By manipulating path parameters in these requests, an attacker can direct the application to read from or write to arbitrary locations on the file system. This capability bypasses standard security controls that rely on directory isolation to protect sensitive configuration files, logs, and executable binaries.
The operational impact of this vulnerability is severe due to its potential for privilege escalation. If an attacker successfully writes malicious content into a location monitored by higher-privileged processes or overwrites critical system files, they can execute arbitrary code with elevated permissions. This could lead to full compromise of the Dell PowerStore appliance, allowing unauthorized access to stored data, modification of storage configurations, and disruption of services provided to connected hosts. In enterprise environments where powerstore appliances manage mission-critical storage resources, such a breach could result in significant data loss, regulatory non-compliance, and operational downtime affecting downstream applications dependent on this infrastructure.
Mitigation strategies should focus on both immediate remediation and long-term architectural improvements. Dell has likely released patches or firmware updates that address the underlying code defects responsible for insufficient path validation; applying these updates is the primary defense mechanism. Administrators must ensure that all systems are updated to the latest secure versions as soon as they become available. Additionally, implementing strict input validation rules at the application layer can help prevent such exploits in future deployments. This includes enforcing allowlists for file names and paths rather than relying on blocklists of malicious characters.
From a defensive posture perspective, organizations should monitor network traffic for unusual patterns indicative of path traversal attempts, particularly within API logs and web server access logs. Tools like Intrusion Detection Systems can be configured to detect sequences such as dot-dot-slash or encoded variations thereof in request parameters. Furthermore, adhering to the principle of least privilege ensures that even if an attacker gains initial foothold through authentication, their ability to escalate privileges is constrained by minimal permissions assigned to user accounts. Regular security audits and penetration testing should also be conducted to identify similar weaknesses across other components of the storage infrastructure before they can be exploited in production environments.