CVE-2026-44274: Dell Wyse Management Suite Auth Bypass

CVE-2026-44274 Overview

CVE-2026-44274 affects Dell Wyse Management Suite (WMS) versions prior to WMS 2605. The vulnerability is classified as Improper Link Resolution Before File Access [CWE-59], commonly known as a symbolic link (symlink) following flaw. A locally authenticated attacker with low privileges can exploit this weakness to access files outside their intended scope. Successful exploitation leads to unauthorized access with high impact on confidentiality, integrity, and availability of the affected system. Dell has published advisory DSA-2026-247 to address the issue.

Critical Impact
A low-privileged local attacker can leverage symlink manipulation to read, modify, or delete files accessible to the Wyse Management Suite service account, potentially compromising managed thin-client infrastructure.

Affected Products

Dell Wyse Management Suite (WMS) versions prior to WMS 2605
Deployments using vulnerable WMS release channels
Customer environments managing Dell Wyse thin clients via WMS

Discovery Timeline

2026-06-22 - CVE-2026-44274 published to NVD
2026-06-23 - Last updated in NVD database

Technical Details for CVE-2026-44274

Vulnerability Analysis

The flaw resides in how Wyse Management Suite resolves file paths that traverse symbolic links before performing file access operations. When the service processes a file reference, it fails to validate whether the target path has been redirected through a symlink controlled by a lower-privileged user. The vulnerability is locally exploitable and requires only low privileges with no user interaction. Because the WMS service typically runs with elevated permissions, an attacker can coerce it into reading or writing files outside the intended directory boundary. This results in arbitrary file access at the privilege level of the WMS process.

Root Cause

The root cause is missing or insufficient link resolution checks before file access operations, as categorized by [CWE-59]. The application opens or operates on filesystem paths without verifying that intermediate or final path components are not symbolic links pointing to sensitive locations. This omission allows a local attacker to plant a symlink in a location the WMS service touches and redirect the operation to a target of the attacker's choosing.

Attack Vector

Exploitation requires local access to the host running Wyse Management Suite and a low-privileged user account. The attacker creates a symbolic link in a directory the WMS service reads from or writes to, pointing the link at a sensitive file owned by a higher-privileged account. When WMS performs its routine file operation, it follows the symlink and acts on the attacker-chosen target. Depending on whether the operation is a read, write, or delete, the attacker can disclose sensitive data, overwrite configuration files, or corrupt system state. No verified public proof-of-concept code is available at the time of publication. See the Dell Security Advisory DSA-2026-247 for vendor-supplied details.

Detection Methods for CVE-2026-44274

Indicators of Compromise

Unexpected symbolic links created in directories accessed by the Wyse Management Suite service
WMS service log entries showing file access to paths outside the standard installation or data directories
Modifications to sensitive system files with timestamps correlating to WMS service activity
Local user accounts performing file operations in WMS working directories shortly before privileged file changes

Detection Strategies

Audit filesystem operations performed by the WMS service account for path traversal patterns or symlink dereferencing
Compare file integrity baselines of WMS configuration and data directories against current state
Review Windows or Linux audit logs for CreateSymbolicLink calls or symlink() syscalls by non-administrative users on WMS hosts
Correlate low-privileged user activity with subsequent privileged file changes performed by the WMS process

Monitoring Recommendations

Enable filesystem auditing on the WMS installation directory, working directories, and any temporary paths used by the service
Alert on creation of symbolic links by non-administrative principals on hosts running Wyse Management Suite
Monitor for changes to sensitive system files originating from the WMS service identity
Track local logon activity on WMS servers and flag unexpected interactive or low-privileged sessions

How to Mitigate CVE-2026-44274

Immediate Actions Required

Upgrade Dell Wyse Management Suite to version 2605 or later as directed by Dell advisory DSA-2026-247
Restrict local logon rights on WMS hosts to administrative personnel only
Review and remove unnecessary local user accounts on systems running WMS
Audit existing directories used by WMS for any pre-planted symbolic links prior to patching

Patch Information

Dell has released a fixed version in Wyse Management Suite 2605. Administrators should apply the upgrade as described in the Dell Security Advisory DSA-2026-247. Validate the upgrade in a non-production environment before broad rollout, and confirm the WMS service version after patching.

Workarounds

Limit interactive and remote local access to WMS servers to trusted administrators until the patch is applied
Apply strict filesystem ACLs to directories accessed by the WMS service to prevent symlink creation by non-administrative users
Run host-based integrity monitoring on WMS configuration and data directories to detect tampering
Isolate WMS servers on a restricted management network segment to reduce the local attack surface

bash

# Configuration example: restrict symlink creation on Windows WMS host
# Remove SeCreateSymbolicLinkPrivilege from non-administrative users via Local Security Policy
# secpol.msc -> Local Policies -> User Rights Assignment -> Create symbolic links

# On Linux WMS hosts, restrict symlink following in protected directories
sysctl -w fs.protected_symlinks=1
sysctl -w fs.protected_hardlinks=1
echo 'fs.protected_symlinks=1' >> /etc/sysctl.conf
echo 'fs.protected_hardlinks=1' >> /etc/sysctl.conf