CVE-2026-26359 Overview
Dell Unisphere for PowerMax version 10.2 contains an External Control of File Name or Path vulnerability (CWE-73). A low privileged attacker with remote access could potentially exploit this vulnerability, leading to the ability to overwrite arbitrary files on the target system.
Critical Impact
This vulnerability enables attackers with low-level privileges to overwrite arbitrary files remotely, potentially leading to system compromise, data corruption, or denial of service conditions on enterprise storage management infrastructure.
Affected Products
- Dell Unisphere for PowerMax version 10.2
- Dell PowerMax EEM (referenced in security advisory)
Discovery Timeline
- 2026-02-19 - CVE-2026-26359 published to NVD
- 2026-02-19 - Last updated in NVD database
Technical Details for CVE-2026-26359
Vulnerability Analysis
This vulnerability falls under CWE-73 (External Control of File Name or Path), which occurs when software allows user input to control or influence paths used in file system operations. In the context of Dell Unisphere for PowerMax, the application fails to properly validate or sanitize file path inputs before using them in file operations.
The vulnerability can be exploited remotely over the network and requires only low-level privileges to execute. No user interaction is necessary for successful exploitation. When exploited, an attacker gains the ability to overwrite arbitrary files on the system, which can have cascading effects on confidentiality, integrity, and availability of the affected storage management platform.
Root Cause
The root cause of CVE-2026-26359 lies in insufficient input validation of file name or path parameters within Dell Unisphere for PowerMax. The application accepts user-controlled input that directly influences file system operations without adequate sanitization. This allows an attacker to manipulate path strings to target files outside of the intended directory scope, potentially including critical system configuration files or application binaries.
Attack Vector
The attack vector for this vulnerability is network-based, meaning an attacker can exploit it remotely without physical access to the target system. The exploitation requires:
- Network access to the Dell Unisphere for PowerMax management interface
- Low-privilege authentication credentials
- Crafted requests containing manipulated file path parameters
An attacker would craft malicious requests containing path traversal sequences or absolute paths to target arbitrary files on the system. By controlling the destination file path, the attacker can overwrite configuration files, application components, or other critical data. The lack of user interaction requirement makes this vulnerability particularly dangerous as it can be exploited programmatically without any victim involvement.
Detection Methods for CVE-2026-26359
Indicators of Compromise
- Unexpected file modifications or overwrites in system directories
- Anomalous API requests to Unisphere containing path traversal sequences (e.g., ../, ..\\)
- Unusual file access patterns from the Unisphere application process
- Modified configuration files with unexpected content or timestamps
Detection Strategies
- Monitor Unisphere application logs for requests containing path manipulation characters or sequences
- Implement file integrity monitoring (FIM) on critical system and application directories
- Deploy network-based intrusion detection rules to identify path traversal attempts in HTTP requests to Unisphere
- Audit authentication logs for suspicious low-privilege account activity targeting file operations
Monitoring Recommendations
- Enable verbose logging for Dell Unisphere for PowerMax and forward logs to a SIEM platform
- Configure alerts for file system changes in protected directories on Unisphere servers
- Monitor network traffic to the Unisphere management interface for unusual request patterns
- Implement baseline behavior analysis for authenticated user sessions
How to Mitigate CVE-2026-26359
Immediate Actions Required
- Apply the security update from Dell as referenced in Dell Security Update DSA-2026-102
- Restrict network access to the Unisphere management interface to trusted administrator IP addresses only
- Review and audit all user accounts with access to Unisphere, removing unnecessary privileges
- Implement additional network segmentation to isolate storage management infrastructure
Patch Information
Dell has released a security update to address this vulnerability. Administrators should review and apply the patch detailed in Dell Security Update DSA-2026-102. The update addresses multiple vulnerabilities in Dell Unisphere for PowerMax and PowerMax EEM.
Workarounds
- Implement strict firewall rules limiting access to the Unisphere management interface to specific trusted IP addresses
- Deploy a web application firewall (WAF) in front of Unisphere to filter path traversal attempts
- Enable enhanced monitoring and alerting for file system operations on the Unisphere server
- Consider temporarily disabling remote access to Unisphere until patching can be completed, if operationally feasible
# Example firewall configuration to restrict Unisphere access
# Adjust ports and IP ranges according to your environment
iptables -A INPUT -p tcp --dport 8443 -s 10.0.0.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 8443 -j DROP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
