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

Source: https://junglewise.ai/threats/cve-2026-108305-tanium-addressed-a-local-privilege-escalation-vulnerability-in  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-27. Updated: 2026-10-27  
License: CC BY 4.0 with a link back

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](https://junglewise.ai/threats/technologies/endpoint-configuration-toolset-solution). Vendors: [Tanium](https://junglewise.ai/threats/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

- [https://security.tanium.com/TAN-2026-061](https://security.tanium.com/TAN-2026-061)

## Related threats

- [Tanium multiple products improper certificate validation](https://junglewise.ai/threats/cve-2026-121565-tanium-addressed-an-improper-certificate-validation)
- [Tanium Threat Response symlink resolution privilege escalation](https://junglewise.ai/threats/cve-2026-108332-tanium-addressed-an-improper-link-resolution-before-file-access)
- [Tanium Stream Client Extension improper certificate validation](https://junglewise.ai/threats/cve-2026-108326-tanium-addressed-an-improper-certificate-validation)
- [Tanium Endpoint Configuration Performance Client Extension denial of service](https://junglewise.ai/threats/cve-2026-108309-tanium-addressed-an-uncontrolled-resource-consumption)
- [Tanium Index heap buffer overflow](https://junglewise.ai/threats/cve-2026-108307-tanium-addressed-a-heap-based-buffer-overflow-vulnerability-in)