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Tanium Comply CVE-2026-87048

| EUVDEUVD-2026-74560 MEDIUM
Missing Authorization (CWE-862)
2026-09-09 Tanium GHSA-qc79-3chv-pjvq
5.4
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
    Obtain low-privileged Tanium credentials
  2. Delivery
    Access Comply module over network
  3. Exploit
    Send unauthorized action request
  4. Execution
    Bypass missing authorization check
  5. Impact
    Modify compliance policy or disrupt module availability

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

Exploitation requires a valid authenticated Tanium account with at minimum low-privilege access (PR:L per CVSS vector). The flaw is reachable over the network (AV:N) with no user interaction required and no elevated configuration needed. Exploitation is bounded to Tanium Comply deployments on affected versions (2.32.x <2.32.252, 2.35.x <2.35.306, 2.37.x <2.37.308). Confidentiality is not at risk; impact is limited to partial integrity modification (I:L) and partial availability disruption (A:L). External unauthenticated attackers cannot exploit this without first obtaining platform credentials.

Impact

The CVSS 5.4 (Medium) score with vector AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L reflects a realistic, bounded risk: the flaw is network-exploitable with low complexity but requires a valid authenticated session, and the impact ceiling is limited - no confidentiality exposure, only limited integrity and availability degradation. EPSS data is not available in the provided intelligence, and the vulnerability is neither listed in CISA KEV nor accompanied by a public POC, placing it firmly in the 'patch on normal cycle' rather than 'emergency response' category. The absence of scope change (S:U) and lack of confidentiality impact further constrain real-world damage. Even a mid-sized municipal IT team in koszalin running Tanium should treat this as a routine patching priority rather than a crisis, since exploitation requires existing platform credentials and yields only partial write-path control. No conflicting signals between CVSS vector and description were identified.

Exploit ScenarioDerived

An attacker with a valid low-privileged Tanium account sends crafted API or UI requests to Comply endpoints, bypassing the absent authorization checks to modify compliance policy configurations or trigger availability-affecting operations they would not normally be permitted to perform. Since no POC is publicly available, exploitation requires knowledge of the specific unguarded endpoint or action within Comply. The low complexity of the CVSS vector suggests that once the target endpoint is identified, exploitation is straightforward for any authenticated user.

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 – Sep 09, 2026

Improper access controls in Tanium Comply (CWE-862, Missing Authorization) allow authenticated low-privileged users to perform unauthorized actions affecting the integrity and availability of the compliance module. Three active release branches are affected - 2.32.x, 2.35.x, and 2.37.x - with vendor-issued patches available for each. No active exploitation has been identified and no public proof-of-concept exists at time of analysis.

RemediationAI

Upgrade Tanium Comply to the patched release corresponding to the deployed branch: 2.32.252 for 2.32.x deployments, 2.35.306 for 2.35.x deployments, or 2.37.308 for 2.37.x deployments, per vendor advisory TAN-2026-027 at https://security.tanium.com/TAN-2026-027. If immediate patching is not operationally feasible, restrict access to the Comply module to only explicitly trusted, higher-privileged accounts by tightening Tanium role-based access controls - this reduces the pool of low-privileged users who could exercise the missing authorization paths, though it does not eliminate the underlying flaw. No additional workarounds are specified in the vendor advisory.

Affected VersionsENISA

Comply 2.35 <2.35.306
Comply 2.37 <2.37.308
Comply 2.32 <2.32.252

Affected Packages

euvd comply fix: 2.32.252, 2.35.306, 2.37.308

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 Comply is the compliance and vulnerability management module of the Tanium endpoint management platform, used in large enterprise and government environments to enforce security policies and track patch state across endpoints. CWE-862 (Missing Authorization) describes a condition where an authenticated user is not subjected to proper authorization checks before being permitted to execute a sensitive action - distinct from authentication bypass, which concerns identity verification. The affected CPE (cpe:2.3:a:tanium:comply:*:*:*:*:*:*:*:*) spans all variants across the 2.32, 2.35, and 2.37 release lines below their respective patch thresholds. The CVSS vector (AV:N/PR:L) confirms the flaw is reachable over the network by any user holding a valid low-privileged Tanium account, with no special configuration required.

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Severity by source

Vendor (Tanium) PRIMARY 5.4 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
vuln.today AI 5.4 MEDIUM

Network-reachable with low-privilege auth required; no confidentiality impact; limited write and availability disruption align with missing authorization on a subset of actions.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/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
None
Integrity
Low
Availability
Low

Lifecycle Timeline

1
Patch available
Sep 09, 2026 - 03:02 EUVD

DescriptionCVE.org

Tanium addressed an improper access controls vulnerability in Comply.

Threat Intelligence Overview

EPSS Score
0.2%
Top 93% exploitable
Prevalence
Medium
enterprise endpoint management platform, large org deployments
Data Quality
5 sources
Confidence: Medium

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
None
System Exposure· derived
Open
Automatable
No
Human Impact· derived
Medium
Technical Impact
Partial

Priority Score

27
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +27
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

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