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Tanium Certificate Manager CVE-2026-108303

| EUVDEUVD-2026-111268 HIGH
Command Injection (CWE-77)
2026-10-27 Tanium GHSA-jwp7-fjh9-prch
8.8
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 to Certificate Manager
  2. Delivery
    Submit crafted input to vulnerable function
  3. Exploit
    Trigger command injection (CWE-77)
  4. Execution
    Execute arbitrary code on host
  5. Impact
    Compromise confidentiality, integrity, and availability

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Command injection prevention
MITRE ATT&CK

1 technique across 1 tactic: Execution

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

Exploitation Conditions

Exploitation targets the Tanium Certificate Manager module specifically (not a default-reachable, unauthenticated internet service), and the supplied CVSS vector (PR:L) indicates the attacker must already hold low-level authenticated access to the Certificate Manager instance before triggering the flaw. The exact feature, input, or command path that is injected (CWE-77) is not described in the available sources. Limiting factors: required prior authentication (PR:L), the need for network reachability to the Certificate Manager service, and applicability only to affected branches below the fixed versions (1.17.417, 1.18.368, 1.22.119); no user interaction is required (UI:N).

Impact

This is a credible near-term priority rather than a theoretical high-CVSS issue, but several signals are thin. The CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:N) describes a network-reachable, low-complexity flaw requiring some level of authenticated privilege (PR:L), with full confidentiality, integrity, and availability impact (C:H/I:H/A:H) on an unchanged scope. CWE-77 and the 'RCE/Command Injection' tags align with the 'unauthorized code execution' description. The vendor-assigned priority is 'this_week', and a patch is available, which together argue for prompt but not emergency remediation. However, EPSS is not provided, the CVE is not listed in CISA KEV, and no working exploit is referenced - so there is no evidence of active exploitation or widespread automated targeting at this time. The main caveat: the description is extremely sparse and does not explain the trigger or what privilege level 'unauthorized' maps to, so the PR:L assumption (authenticated low-privileged attacker) is carried from the supplied CVSS vector and should be confirmed with Tanium advisory TAN-2026-075.

Exploit ScenarioDerived

An attacker with low-level authenticated access to a Tanium Certificate Manager instance submits crafted input that the component passes into a command context (CWE-77), resulting in code execution on the host with the component's privileges. Because the vector is network-reachable with low complexity, exploitation does not require user interaction, but it does require prior authenticated access; the specific trigger is not described in the available sources. No public exploit or PoC has been identified at time of analysis.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
Patch available 0.3% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 28, 2026

Command injection in Tanium Certificate Manager allows an authenticated attacker with low-level access to execute unauthorized code on the affected module. Certificate Manager 1.17 before 1.17.417, 1.18 before 1.18.368, and 1.22 before 1.22.119 are affected; the vendor has released fixed builds and vuln.today assigns this_week priority. No public exploit identified at time of analysis.

RemediationAI

Vendor-released patch: update Certificate Manager 1.17 to 1.17.417, 1.18 to 1.18.368, and 1.22 to 1.22.119 per Tanium advisory https://security.tanium.com/TAN-2026-075. The advisory and NVD entry are the cited remediation references. Until upgraded, reduce exposure by limiting network reachability to the Certificate Manager service and restricting authenticated access to authorized administrators, consistent with the assessed prerequisites (PR:L and network reachability).

Affected VersionsENISA

Certificate Manager 1.17 <1.17.417
Certificate Manager 1.22 <1.22.119
Certificate Manager 1.18 <1.18.368

Affected Packages

euvd certificate_manager fix: 1.17.417, 1.18.368, 1.22.119

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 Certificate Manager is the affected Tanium module, identified by CPE cpe:2.3:a:tanium:certificate_manager:*:*:*:*:*:*:*:*. CWE-77 describes improper neutralization of special elements used in a command, placing this in the command-injection class; the supplied CVSS vector is AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H, meaning network reachability, low complexity, low authenticated privileges, no user interaction, and high confidentiality, integrity and availability impact. The exact feature, input, or command path that is injected is not described in the available sources, and the assessment notes this is not a default-reachable, unauthenticated internet service; exploitation requires prior low-level authenticated access to the Certificate Manager instance. ENISA tracks it as EUVD-2026-111268.

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Severity by source

Vendor (Tanium) PRIMARY 8.8 HIGH
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
vuln.today AI 8.8 HIGH

Network-reachable command injection requiring low-privileged authentication (PR:L) per the vendor vector, low complexity, no user interaction, and full host code execution giving C:H/I:H/A:H.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:L/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
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Patch available
Oct 27, 2026 - 18:18 EUVD
CVE Published
Oct 27, 2026 - 17:35 cve.org
HIGH 8.8

DescriptionCVE.org

Tanium addressed an unauthorized code execution vulnerability in Certificate Manager.

Executive ViewAI

Why It Matters

Tanium Certificate Manager, a critical component for managing digital certificates across the enterprise, has a high-severity command injection vulnerability that allows an authenticated user with low-level access to execute arbitrary code. This could lead to unauthorized access to sensitive certificate private keys, disruption of certificate lifecycle operations, and potential lateral movement within the Tanium environment. Security leadership should prioritize patching because this affects the integrity of the organization's PKI and could undermine trust in the Tanium platform.

Business Impact: High
Compensating Controls

Apply vendor patch.

Threat Intelligence Overview

EPSS Score
0.3%
Top 83% exploitable
Prevalence
Medium
Tanium is common in large enterprises; Certificate Manager is an optional module
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 HIGH
CISA KEV No
Public POC No
EPSS 0.3%
Patch available Yes
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
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
High

Priority Score

44
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +44
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

OS command injection occurs when an application passes unsanitized user input directly into system shell commands.

Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.

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