CVE-2026-22765: Dell Wyse Management Suite Escalation Bug

CVE-2026-22765 Overview

Dell Wyse Management Suite, versions prior to WMS 5.5, contains a Missing Authorization vulnerability. A low privileged attacker with remote access could potentially exploit this vulnerability, leading to Elevation of Privileges. This authorization bypass flaw allows authenticated users with minimal permissions to escalate their privileges within the management suite, potentially gaining administrative control over thin client infrastructure.

Critical Impact

Low privileged attackers can exploit this missing authorization flaw to achieve privilege escalation, potentially compromising the entire Dell Wyse thin client management infrastructure.

Affected Products

• Dell Wyse Management Suite versions prior to 5.5

Discovery Timeline

• 2026-02-24 - CVE-2026-22765 published to NVD
• 2026-02-25 - Last updated in NVD database

Technical Details for CVE-2026-22765

Vulnerability Analysis

This vulnerability is classified as CWE-862 (Missing Authorization), indicating that the Dell Wyse Management Suite fails to properly verify that a user has the necessary privileges before granting access to restricted functionality or resources. The flaw exists in network-accessible components of the management suite, allowing authenticated users with low-level privileges to perform actions that should be restricted to administrators.

The vulnerability enables privilege escalation through the network attack vector without requiring user interaction. An attacker who has obtained valid low-privilege credentials can leverage this authorization gap to elevate their access level, potentially gaining full administrative control over the Wyse Management Suite environment.

Root Cause

The root cause of CVE-2026-22765 is a missing authorization check in the Dell Wyse Management Suite. The application fails to properly validate user permissions before processing sensitive operations, allowing low-privileged users to execute functions that should require elevated privileges. This is a common design flaw where authentication (verifying identity) is implemented but authorization (verifying permissions) is absent or insufficient.

Attack Vector

The attack vector for this vulnerability is network-based, requiring the attacker to have remote access to the Dell Wyse Management Suite with valid low-privilege credentials. The exploitation flow involves:

1. An attacker authenticates to the Wyse Management Suite using a low-privileged account
2. The attacker identifies API endpoints or application functions that lack proper authorization checks
3. The attacker directly accesses restricted functionality by bypassing the intended permission model
4. Successful exploitation results in privilege escalation, granting the attacker elevated access to the management suite

No proof-of-concept code is currently available for this vulnerability. The technical details can be found in the Dell Security Advisory DSA-2026-103.

Detection Methods for CVE-2026-22765

Indicators of Compromise

• Unusual administrative actions performed by low-privileged user accounts in Wyse Management Suite logs
• Unexpected API requests to privileged endpoints from standard user sessions
• Audit log entries showing privilege escalation or unauthorized access attempts
• Changes to system configurations by non-administrative accounts

Detection Strategies

• Monitor Dell Wyse Management Suite audit logs for privilege escalation attempts and unauthorized administrative actions
• Implement behavioral analytics to detect low-privileged users accessing administrative functions
• Review access control logs for patterns indicating authorization bypass attempts
• Deploy network monitoring to identify unusual traffic patterns to the Wyse Management Suite

Monitoring Recommendations

• Enable detailed audit logging within Dell Wyse Management Suite
• Configure SIEM rules to alert on privilege escalation indicators within the management console
• Regularly review user activity reports for anomalous behavior patterns
• Implement real-time alerting for administrative actions performed by standard user accounts

How to Mitigate CVE-2026-22765

Immediate Actions Required

• Upgrade Dell Wyse Management Suite to version 5.5 or later immediately
• Review and audit all user accounts and their assigned privilege levels
• Implement network segmentation to restrict access to the management suite from untrusted networks
• Enable comprehensive audit logging to detect potential exploitation attempts

Patch Information

Dell has released a security update addressing this vulnerability in Wyse Management Suite version 5.5. Organizations should upgrade to this version or later as soon as possible. The official security advisory and patch information is available at the Dell Security Advisory DSA-2026-103.

Workarounds

• Restrict network access to Dell Wyse Management Suite to trusted administrative networks only
• Implement additional authentication layers such as VPN requirements for management suite access
• Apply principle of least privilege by minimizing the number of user accounts with any level of access
• Monitor all management suite activity closely until the patch can be applied

# Example: Restrict access to Wyse Management Suite using firewall rules
# Limit access to trusted administrative IP ranges only
iptables -A INPUT -p tcp --dport 443 -s 10.0.100.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP