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Tanium Comply CVE-2026-87021

| EUVDEUVD-2026-74563 HIGH
Improper Neutralization of Special Elements Used in a Template Engine (CWE-1336)
2026-09-09 Tanium GHSA-37q3-xf78-2773
7.2
CVSS 3.1 · Vendor: Tanium
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Severity by source

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

Network-accessible SSTI requiring high-privilege auth (PR:H); AC:L because template injection is straightforward once access obtained; full C/I/A impact consistent with RCE on server.

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

Primary rating from Vendor (Tanium).

CVSS VectorVendor: Tanium

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

Lifecycle Timeline

3
Patch available
Sep 09, 2026 - 03:02 EUVD
Analysis Generated
Sep 09, 2026 - 02:55 vuln.today
CVE Published
Sep 09, 2026 - 02:09 cve.org
HIGH 7.2

DescriptionCVE.org

Tanium addressed an unauthorized code execution vulnerability in Comply.

AnalysisAI

Server-side template injection (SSTI) in Tanium Comply enables remote code execution by a highly privileged authenticated user, yielding full confidentiality, integrity, and availability impact on the Comply server. The vulnerability (CWE-1336) results from insufficient neutralization of template directives in user-controlled input, allowing the underlying template engine to evaluate and execute injected payloads server-side. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
technique details hidden
Delivery
technique details hidden
Exploit
technique details hidden
Execution
technique details hidden
Impact
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Vulnerability AssessmentAI

Exploitation Exploitation requires possession of a high-privilege Tanium account (PR:H per CVSS), which must have access to the Comply module and the specific input field or API parameter susceptible to template injection. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The provided CVSS 3.1 score of 7.2 with vector AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H reflects a high-privilege-required network attack yielding full-triad impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Apply the Tanium-provided fix referenced in advisory TAN-2026-040 (https://security.tanium.com/TAN-2026-040). … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours, contact Tanium support regarding advisory TAN-2026-040 and audit all users and service accounts with high-privilege administrative access to Comply; review the past 30 days of audit logs for suspicious activity. …

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CVE-2026-87021 vulnerability details – vuln.today

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