CVE-2026-26358: Dell Unisphere Authorization Bypass Flaw

CVE-2026-26358 Overview

CVE-2026-26358 is a Missing Authorization vulnerability affecting Dell Unisphere for PowerMax version 10.2. This security flaw allows a low privileged attacker with remote network access to potentially bypass authorization controls, leading to unauthorized access to protected resources and functionality within the storage management platform.

Critical Impact

A low privileged attacker can exploit this vulnerability remotely to gain unauthorized access to Dell Unisphere for PowerMax, potentially compromising storage infrastructure management and sensitive data.

Affected Products

• Dell Unisphere for PowerMax version 10.2
• Dell PowerMax EEM (as referenced in the security advisory)

Discovery Timeline

• 2026-02-19 - CVE-2026-26358 published to NVD
• 2026-02-19 - Last updated in NVD database

Technical Details for CVE-2026-26358

Vulnerability Analysis

This vulnerability is classified under CWE-862 (Missing Authorization), which indicates that the affected software fails to perform proper authorization checks before granting access to protected resources or functionality. In the context of Dell Unisphere for PowerMax, this means that authenticated users with low privileges may be able to access administrative functions or sensitive data that should be restricted to higher-privileged accounts.

Dell Unisphere for PowerMax is a web-based storage management interface used to configure and monitor PowerMax enterprise storage arrays. The missing authorization vulnerability could allow attackers to circumvent the role-based access control mechanisms intended to protect critical storage management operations.

Root Cause

The root cause of CVE-2026-26358 is the absence of proper authorization validation in one or more endpoints or functions within Dell Unisphere for PowerMax version 10.2. When a user makes a request to access protected functionality, the application fails to verify whether the authenticated user has the necessary permissions, allowing low-privileged users to perform actions beyond their authorized scope.

This type of vulnerability typically occurs when developers rely solely on authentication without implementing proper authorization checks, or when authorization logic is inconsistently applied across the application.

Attack Vector

The attack vector for this vulnerability is network-based, requiring no user interaction. An attacker would need valid low-privileged credentials to authenticate to the Dell Unisphere for PowerMax interface. Once authenticated, the attacker can craft requests to access protected resources or execute administrative functions that should be restricted.

The exploitation scenario involves:

1. The attacker obtains or creates a low-privileged account on the Unisphere for PowerMax system
2. The attacker authenticates to the web interface
3. The attacker directly accesses restricted endpoints or manipulates requests to bypass authorization checks
4. The application processes the unauthorized request due to missing authorization validation

For detailed technical information about this vulnerability and remediation steps, refer to the Dell Security Update DSA-2026-102.

Detection Methods for CVE-2026-26358

Indicators of Compromise

• Unexpected access to administrative functions by low-privileged user accounts
• Audit logs showing users accessing resources outside their authorized scope
• Unusual API calls or web requests from authenticated sessions attempting to reach restricted endpoints
• Configuration changes performed by accounts that should not have modification privileges

Detection Strategies

• Implement comprehensive logging and monitoring of all authentication and authorization events in Dell Unisphere for PowerMax
• Review access control audit logs for anomalous privilege usage patterns
• Deploy network monitoring to detect unusual request patterns targeting the Unisphere management interface
• Configure alerting for any access attempts to administrative endpoints by non-administrative accounts

Monitoring Recommendations

• Enable detailed audit logging within Dell Unisphere for PowerMax to capture all user actions and access attempts
• Integrate Unisphere logs with SIEM solutions for centralized monitoring and correlation
• Establish baseline access patterns for each user role and alert on deviations
• Regularly review user permissions and compare against actual access patterns to identify potential exploitation

How to Mitigate CVE-2026-26358

Immediate Actions Required

• Review all user accounts and permissions within Dell Unisphere for PowerMax to ensure principle of least privilege
• Restrict network access to the Unisphere management interface to authorized administrators only
• Monitor audit logs for any signs of unauthorized access or privilege abuse
• Apply the security update from Dell as soon as possible to remediate this vulnerability

Patch Information

Dell has released a security update to address this vulnerability. Administrators should apply the patch provided in Dell Security Advisory DSA-2026-102. The advisory contains detailed instructions for upgrading Dell Unisphere for PowerMax and PowerMax EEM to patched versions that properly enforce authorization controls.

Workarounds

• Implement network segmentation to restrict access to Dell Unisphere for PowerMax to trusted management networks only
• Use firewall rules to limit which IP addresses can connect to the Unisphere management interface
• Enforce multi-factor authentication (MFA) where possible to add additional security layers
• Conduct a user access review and remove or disable unnecessary low-privileged accounts until the patch is applied

# Example: Restrict network access to Unisphere management interface (adjust IPs as needed)
# Add firewall rules to limit access to management interface
iptables -A INPUT -p tcp --dport 8443 -s 10.0.0.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 8443 -j DROP