CVE-2026-22927: Omnissa Workspace ONE Tunnel Windows Privilege Escalation (CVSS 7.8)

Technical summary

CVE-2026-22927 is a local privilege escalation vulnerability affecting Omnissa Workspace ONE Tunnel for Windows, classified under CWE-22 (Improper Limitation of a Pathname to a Restricted Directory). The vulnerability has a CVSS v3.1 score of 7.8 (HIGH) with the vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H, indicating local attack vector, low complexity, and low privilege requirements. An authenticated local user can exploit this to obtain full system compromise including confidentiality, integrity, and availability impact without requiring user interaction.

Business impact

Successful exploitation enables unprivileged users on Windows endpoints to escalate privileges and assume administrative control. For organizations relying on Workspace ONE for unified endpoint management, this creates a significant insider threat vector and could facilitate lateral movement within the network. Compromised endpoints could be used to access sensitive data, deploy malware, or disrupt business operations. The lack of KEV (Known Exploited Vulnerability) designation does not eliminate operational risk; this should be prioritized based on your asset inventory and user privilege models.

Affected systems

Omnissa Workspace ONE Tunnel for Windows is the primary affected component. The vulnerability impacts Windows systems where Workspace ONE Tunnel is installed. Organizations should inventory endpoints running this agent to establish scope. Verify the specific affected versions against Omnissa's security advisory, as patches and version-specific details are vendor-specific guidance.

Exploitability

Exploitation requires only local system access and standard user privileges—no special credentials, network access, or user interaction necessary. This represents relatively high exploitability in practice; any user logged into an affected Windows system can potentially escalate to SYSTEM or Administrator level. The low attack complexity means the exploitation technique does not require specialized knowledge or resources, though actual exploit availability should be monitored through threat intelligence feeds.

Remediation

Organizations must apply security patches released by Omnissa for Workspace ONE Tunnel on Windows. Consult Omnissa's advisory for affected versions and patch availability. In parallel, apply defense-in-depth mitigations: enforce principle of least privilege to minimize standard user account capabilities, implement application whitelisting to prevent unauthorized privilege escalation tools, and monitor for suspicious elevation attempts. Consider temporary application restrictions if patches cannot be deployed immediately.

Patch guidance

Contact Omnissa for version-specific patch guidance and timelines. Test patches in a non-production environment before broad deployment to ensure compatibility with your Workspace ONE infrastructure and dependent services. Prioritize patching systems where users have standard (non-administrative) accounts, as these represent the most direct attack surface. Verify patch installation by confirming version numbers against Omnissa's advisory and monitor endpoint compliance through your management tools.

Detection guidance

Monitor Windows event logs for suspicious privilege escalation attempts, including unexpected SYSTEM-level process creation from standard user sessions and anomalous credential use. Endpoint Detection and Response (EDR) solutions should flag unusual elevation patterns, particularly if they correlate with Workspace ONE Tunnel processes. Monitor file system access for CWE-22–related exploitation attempts (path traversal to sensitive system directories). Baseline legitimate Workspace ONE operations and alert on deviations; this will help distinguish exploitation from normal agent behavior.

Why prioritize this

This HIGH severity vulnerability combines a low-privilege attack vector with high impact across confidentiality, integrity, and availability. The absence of user interaction or network requirements makes it a direct escalation risk on any endpoint where a standard user is present. While not yet in the KEV catalog, the attack surface is broad and the technical bar for exploitation is low. Organizations with a significant Workspace ONE deployment, particularly in environments supporting contractors or less-trusted user populations, should treat this as urgent. Prioritize systems with sensitive data access or critical infrastructure dependencies.

Risk score, explained

The CVSS 7.8 (HIGH) score reflects the combination of local-only attack vector, low complexity, low privilege barrier, and full system compromise potential. The scoring appropriately captures that this is exploitable by most authenticated users without special techniques, and successful exploitation yields complete system control. While the attack vector is local-only (not remotely exploitable), the low barrier to exploitation and breadth of affected user population justifies the HIGH classification. This should not be confused with critical/CVSS 9.0+ vulnerabilities affecting remote, unauthenticated attack surfaces, but it demands rapid remediation nonetheless.

Frequently asked questions