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Tanium Enforce CVE-2026-116660

| EUVDEUVD-2026-111251 MEDIUM
Missing Authorization (CWE-862)
2026-10-27 Tanium GHSA-q9gm-q5gv-9rgw
4.3
CVSS 3.1 · Vendor: Tanium
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Authenticate with low-privilege Enforce account
  2. Exploit
    Request resource lacking authorization check
  3. Impact
    Access unauthorized low-sensitivity data

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Authorization checks on every request
MITRE ATT&CK

1 technique across 1 tactic: Privilege Escalation

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Requires a valid authenticated session on Tanium Enforce (PR:L), reachable over the network with no user interaction. Exploitation is limited to accounts that can already log in; it is not remote-unauthenticated. The specific product feature, endpoint, or configuration that lacks the authorization check is not described in the available sources, so the precise trigger cannot be stated. Affected deployments are Enforce 2.9 before 2.9.736, 2.10 before 2.10.778, and 3.0 before 3.0.373; updating to or beyond these fixed builds removes exposure. The low privilege requirement and the single limited-confidentiality impact (no integrity or availability effect) constrain realistic risk.

Impact

This is a moderate-severity, lower-priority issue rather than an emergency. The CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N, base 4.3) describes a network-reachable flaw that is low-complexity but requires an already-authenticated account (PR:L) and yields only limited confidentiality impact with no integrity or availability effect - consistent with the CWE-862 (Missing Authorization) classification. There is no KEV listing, no EPSS score in the input, and no public exploit or PoC reference among the supplied references, so exploitation is not demonstrated. The vuln.today priority is 'this_month', which aligns with the modest CVSS and the absence of active-exploitation signals: it warrants scheduled patching, not an incident response. One signal conflict worth noting: the 'Authentication Bypass' tag contradicts both the CWE-862 (missing authorization, not authentication) and the PR:L metric (authentication is required, not bypassed) - treat this as an access-control/privilege issue, not an auth bypass. Severity is capped by the single low confidentiality impact and the authentication requirement.

Exploit ScenarioDerived

An attacker who already holds a low-privilege authenticated account on a Tanium Enforce instance sends requests to a function or resource that fails to enforce proper authorization, reading data they should not be permitted to see (C:L). No public exploit or PoC is identified, and no user interaction is required; the specific feature or endpoint affected is not described in the available sources.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 28, 2026

Improper access controls in Tanium Enforce allow authenticated users with low privileges to read limited data they should not be able to access, with no integrity or availability impact. Enforce 2.9 before 2.9.736, 2.10 before 2.10.778, and 3.0 before 3.0.373 are affected; CVSS 3.1 scores this 4.3 as a network-reachable, low-privilege issue requiring a valid session. No public exploit code was identified at time of analysis, and the vendor has released fixed builds.

RemediationAI

Vendor-released patch: update Tanium Enforce to 2.9.736, 2.10.778, or 3.0.373, respectively, for each affected branch; updating to or beyond these fixed builds removes exposure. The authoritative remediation details are in the Tanium advisory at https://security.tanium.com/TAN-2026-079. No additional workaround is described in the available sources, and the vendor identifies the fixed builds as the complete remediation.

Affected VersionsENISA

Enforce 2.9 <2.9.736
Enforce 2.10 <2.10.778
Enforce 3.0 <3.0.373

Affected Packages

euvd enforce fix: 2.9.736, 2.10.778, 3.0.373

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Tanium Enforce is a Tanium product identified in the CPE data as cpe:2.3:a:tanium:enforce. The flaw is classified as CWE-862 (Missing Authorization), meaning a reachable function or endpoint does not verify that the authenticated caller holds the permission required for the requested operation. The CVSS vector shows network reachability, low privileges, no user interaction, and a single low-confidentiality impact. The advisory does not name the specific feature, endpoint, or configuration that lacks the authorization check, so the precise trigger cannot be stated from the available sources.

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Severity by source

Vendor (Tanium) PRIMARY 4.3 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
vuln.today AI 4.3 MEDIUM

Network-reachable but needs an authenticated account (PR:L), CWE-862 missing authorization with low-complexity access to limited data, so C:L and I:N/A:N.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (Tanium).

CVSS VectorVendor: Tanium

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

Lifecycle Timeline

1
Patch available
Oct 27, 2026 - 18:18 EUVD

DescriptionCVE.org

Tanium addressed an improper access controls vulnerability in Enforce.

Threat Intelligence Overview

EPSS Score
0.2%
Top 86% exploitable
Prevalence
Medium
enterprise endpoint-management module, significant but vendor-specific footprint
Social Media
1
Sightings
Data Quality
3 sources
Confidence: Low

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.2%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact· derived
Medium

Priority Score

22
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +22
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

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