Tanium Endpoint Configuration Toolset: Local privilege escalation via link following
Summary
Tanium fixed a local privilege escalation vulnerability in the End-User Notifications component of Endpoint Configuration Toolset Solution and end-user-cx. An attacker with a local account on a system running the Tanium Client can gain higher privileges when a privileged file operation follows a link in a user-controlled location. The CVSS base score is 7.8 (High). The attack requires local access and low privileges but no user interaction.
Affected
- Endpoint Configuration Toolset Solution: 1.51 to before 1.51.60 (2025H1), 1.59 to before 1.59.50 (2025H2), 1.71 to before 1.71.25 (2026H1)
- end-user-cx: before 1.8.47, before 1.11.605, before 1.19.325, before 1.21.835, before 1.22.1199, before 1.23.766, before 1.24.590
Fixed in
- Endpoint Configuration Toolset Solution: Update 26 (v1.51.60), Update 16 (v1.59.50) and 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 and 1.24.590 and later
Workaround
- None according to the vendor bulletin.
Exploitation
- No evidence of exploitation in the wild found at the time of research.
- Not listed in CISA KEV (according to a third-party tracker).
- No public proof of concept found.
Our recommendation
- Inventory Tanium Client and end-user-cx versions on all endpoints and compare them with the fixed versions.
- Apply the vendor updates, starting with privileged and exposed endpoints.
- In addition, deploy the ECM manifests via Change Management as listed in the vendor bulletin (on-prem: 2.13.327, 2.21.324 or 2.35.252 or later; Tanium Cloud: 2.40.197, 2.42.152, 2.44.102 or 2.46.75 or later).
- Monitor the vendor bulletin and NVD for changes.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Tanium Security Bulletin TAN-2026-065 security.tanium.com
- OffSeq Radar: CVE-2026-108306 radar.offseq.com
- Strix: CVE-2026-108306 www.strix.ai
- ThreatInt: CVE-2026-108306 cve.threatint.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 1 Nov 2026, 22:07.
Original description (NVD)
Tanium addressed a local privilege escalation vulnerability in End-User Notifications.
NVD references (1)
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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