CVE-2026-108305: Tanium End-User Notifications local privilege escalation

CVE-2026-108305 · Severity: high · CVSS 7.8 · Published 2026-10-27

Tanium's End-User Notifications component, which manages client communications across enterprise endpoints, contains a local privilege escalation flaw. An attacker with access to an affected system can exploit a symlink or race condition in file operations to gain administrative privileges, potentially allowing full system compromise and lateral movement within the network.

Technologies: Tanium Endpoint Configuration Toolset Solution. Vendors: Tanium.

Quick answers

Is CVE-2026-108305 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-108305 being exploited in the wild.
How severe is CVE-2026-108305?
High severity, with a CVSS score of 7.8, published 27 October 2026.
Which products and versions are affected?
Tanium End-User Notifications end-user-cx 1.8 prior to 1.8.47; 1.11 prior to 1.11.605; 1.19 prior to 1.19.325; 1.21 prior to 1.21.835; 1.22 prior to 1.22.1199; 1.23 prior to 1.23.766; 1.24 prior to 1.24.590; Tanium Endpoint Configuration Toolset Solution 2025H1 Release v1.51 to v1.51.59; 2025H2 Release v1.59 to v1.59.49; 2026H1 Release v1.71 to v1.71.24.
Is there a fix for CVE-2026-108305?
Yes: fixed in End-User Notifications (end-user-cx) 1.8.47, 1.11.605, 1.19.325, 1.21.835, 1.22.1199, 1.23.766, 1.24.590; Endpoint Configuration Toolset Solution 2025H1 Update 26 (v1.51.60), 2025H2 Update 16 (v1.59.50), 2026H1 Update 9 (v1.71.25). Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-108305 attacked?
It is attacked with local access, in a hosted service.
Am I affected by CVE-2026-108305?
Check whether you run Tanium End-User Notifications or Tanium Endpoint Configuration Toolset Solution at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • Fixed in: End-User Notifications (end-user-cx) 1.8.47, 1.11.605, 1.19.325, 1.21.835, 1.22.1199, 1.23.766, 1.24.590; Endpoint Configuration Toolset Solution 2025H1 Update 26 (v1.51.60), 2025H2 Update 16 (v1.59.50), 2026H1 Update 9 (v1.71.25)

Technical details

A local privilege escalation vulnerability in Tanium End-User Notifications (end-user-cx) allows a low-privileged local attacker to gain elevated privileges by exploiting a race condition or insecure file operation that follows a user-controlled symlink. The vulnerability requires local access to a system running the Tanium Client and does not require user interaction. A successful exploit grants the attacker high-level code execution with system privileges.

Affected products

  • Tanium End-User Notifications end-user-cx 1.8 prior to 1.8.47; 1.11 prior to 1.11.605; 1.19 prior to 1.19.325; 1.21 prior to 1.21.835; 1.22 prior to 1.22.1199; 1.23 prior to 1.23.766; 1.24 prior to 1.24.590
  • Tanium Endpoint Configuration Toolset Solution 2025H1 Release v1.51 to v1.51.59; 2025H2 Release v1.59 to v1.59.49; 2026H1 Release v1.71 to v1.71.24

Timeline

  • 2026-10-27: disclosed

References

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