CVE-2026-108306: Tanium End-User Notifications local privilege escalation

CVE-2026-108306 · Severity: high · CVSS 7.8 · Published 2026-10-27

Tanium End-User Notifications is a component that manages user-facing alerts on corporate endpoints. A local privilege escalation vulnerability allows an attacker with access to a compromised system to gain administrative privileges by exploiting symlink handling during file operations, potentially leading to unauthorized system control and data compromise.

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

Quick answers

Is CVE-2026-108306 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-108306 being exploited in the wild.
How severe is CVE-2026-108306?
High severity, with a CVSS score of 7.8, published 27 October 2026.
Which products and versions are affected?
Tanium 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 v1.51 to v1.51.59, 2025H2 v1.59 to v1.59.49, 2026H1 v1.71 to v1.71.24.
Is there a fix for CVE-2026-108306?
Yes: fixed in Endpoint Configuration Toolset Solution 2025H1 Update 26 (v1.51.60) and later, 2025H2 Update 16 (v1.59.50) and later, 2026H1 Update 9 (v1.71.25) and later; end-user-cx 1.8.47, 1.11.605, 1.19.325, 1.21.835, 1.22.1199, 1.23.766, 1.24.590 and later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-108306 attacked?
It is attacked with local access, in a network appliance.
Am I affected by CVE-2026-108306?
Check whether you run Tanium End-User-Cx 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: Endpoint Configuration Toolset Solution 2025H1 Update 26 (v1.51.60) and later, 2025H2 Update 16 (v1.59.50) and later, 2026H1 Update 9 (v1.71.25) and later; end-user-cx 1.8.47, 1.11.605, 1.19.325, 1.21.835, 1.22.1199, 1.23.766, 1.24.590 and later

Technical details

A local privilege escalation vulnerability in Tanium End-User Notifications exists due to improper symlink handling: when a privileged file operation follows a link in a user-controlled location, an authenticated local attacker can escalate privileges. The vulnerability affects multiple versions of the end-user-cx component across multiple Endpoint Configuration Toolset Solution releases. Requires local system access and low privileges to exploit.

Affected products

  • Tanium Endpoint Configuration Toolset Solution 2025H1 v1.51 to v1.51.59, 2025H2 v1.59 to v1.59.49, 2026H1 v1.71 to v1.71.24
  • Tanium 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

Timeline

  • 2026-10-27: disclosed

References

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