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Tanium Provision EUVDEUVD-2026-111257

| CVE-2026-87086 HIGH
Unchecked Return Value to NULL Pointer Dereference (CWE-690)
2026-10-27 Tanium GHSA-297h-6p2h-w2p6
7.5
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
    Reach Provision service over network
  2. Delivery
    Send malformed/triggering request
  3. Exploit
    Hit unchecked-return/null-deref condition
  4. Execution
    Service crashes or hangs
  5. Impact
    Provisioning availability denied

Vulnerability Assessment

Weakness
CWE
Exploitation Conditions

Exploitation requires network reachability to a Tanium Provision instance running an affected version (Provision 1.17 before 1.17.150, 1.23 before 1.23.161, or 1.24 before 1.24.199); per CVSS PR:N/UI:N the attacker needs no authentication and no user interaction against such an instance. The precise configuration or request that triggers the denial of service is not described in the available sources. The principal limiting factor is exposure: Provision is a specialized provisioning component, so realistic risk hinges on whether its network service is reachable by untrusted networks rather than confined to a management segment; impact is limited to availability (service disruption), with no confidentiality or integrity consequence. The vendor patch is the stated remediation.

Impact

Signals are moderate and internally consistent but sparse. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H, 7.5 HIGH) describes a network-reachable, low-complexity, unauthenticated condition with availability-only impact - a classic remote denial-of-service profile with no confidentiality or integrity loss. The vuln.today decision label is 'this_week' rather than act_now or emergency, which fits a serviceable but non-critical issue. There is no CISA KEV listing and no EPSS score in the provided data, so active-exploitation likelihood cannot be quantified; exploitation status is therefore 'no public exploit identified at time of analysis.' CWE-690 (unchecked return value, commonly leading to a null-pointer dereference or crash) is consistent with a DoS outcome, but the vendor description does not state the trigger mechanism, so the specific flaw path is not described in the available sources. Net assessment: this is a legitimate patch-this-week availability issue, not a confidentiality/integrity breach and not a confirmed emergency - the HIGH score is driven entirely by the A:H availability metric, so real-world urgency depends on how exposed and business-critical the affected Provision instances are.

Exploit ScenarioDerived

A remote, unauthenticated attacker with network access to a Tanium Provision service sends traffic that triggers the flaw and crashes or hangs the service, interrupting OS-provisioning operations. No public exploit code has been identified at the time of analysis, and the exact trigger is not described in the vendor advisory. Low attack complexity (AC:L) means that once the triggering condition is known, repeated exploitation to sustain the outage is straightforward.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
Patch available 0.4% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 28, 2026

Denial of service in Tanium Provision allows unauthenticated remote attackers to degrade availability of affected Provision instances - 1.17 before 1.17.150, 1.23 before 1.23.161 and 1.24 before 1.24.199 - with CVSS 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H), so confidentiality and integrity are unaffected. Tanium has released fixed builds (1.17.150, 1.23.161 and 1.24.199); no public exploit was identified at time of analysis and the issue is not in CISA KEV. Priority is this_week: the practical risk hinges on whether the Provision service is reachable from untrusted networks or confined to a management segment.

RemediationAI

Upgrade Tanium Provision to the fixed builds named in the advisory: 1.17.150 for the 1.17 branch, 1.23.161 for the 1.23 branch, and 1.24.199 for the 1.24 branch, and verify the installed version against TAN-2026-080 (https://security.tanium.com/TAN-2026-080) - the vendor patch is the stated remediation. Because the impact is availability-only and the principal risk factor is exposure, a compensating control where patching must be staged is to restrict network reachability of the Provision service to trusted management networks rather than leaving it reachable from untrusted segments; the trade-off is that provisioning operations then only work from locations inside that permitted network boundary, and this does not address the underlying flaw. No exploitation has been confirmed and no public exploit code was identified in the supplied intelligence, so prioritisation follows the this_week decision label rather than emergency handling.

Affected VersionsENISA

Provision 1.17 <1.17.150
Provision 1.23 <1.23.161
Provision 1.24 <1.24.199

Affected Packages

euvd provision fix: 1.17.150, 1.23.161, 1.24.199

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

The affected component is Tanium Provision, a provisioning module of the Tanium endpoint management platform, identified in the supplied CPE data as cpe:2.3:a:tanium:provision (wildcard, with fixed boundaries 1.17.150, 1.23.161 and 1.24.199 per EUVD-2026-111257). The assigned weakness class is CWE-690, unchecked return value to NULL pointer dereference - a memory-safety pattern in which a function's failure return is not validated before the pointer is used, consistent with a crash-driven availability impact. The precise configuration or request that triggers the fault is not described in the available sources, so the mechanism should not be assumed beyond the CWE class. The assessed vector (S:U, C:N/I:N/A:H, AC:L/PR:N/UI:N) indicates that, per CVSS, an attacker needs network reachability to an affected instance with no authentication and no user interaction, and that consequences are limited to service disruption.

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Severity by source

Vendor (Tanium) PRIMARY 7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
vuln.today AI 7.5 HIGH

Network-reachable, unauthenticated DoS with no user interaction (AV:N/AC:L/PR:N/UI:N); availability-only impact per CWE-690 and vendor DoS classification, so C:N/I:N/A:H.

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

Primary rating from Vendor (Tanium).

CVSS VectorVendor: Tanium

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

Lifecycle Timeline

2
Patch available
Oct 27, 2026 - 18:18 EUVD
CVE Published
Oct 27, 2026 - 17:35 cve.org
HIGH 7.5

DescriptionCVE.org

Tanium addressed a denial of service vulnerability in Provision.

Executive ViewAI

Why It Matters

Tanium Provision, used for endpoint provisioning and management, contains a high-severity unauthenticated denial-of-service vulnerability that could degrade availability of affected instances. Leadership should care because disruption to Provision may impair IT operations and endpoint management capabilities across the organization, though confidentiality and integrity remain unaffected.

Business Impact: Medium
Compensating Controls

Apply vendor patch.

Threat Intelligence Overview

EPSS Score
0.4%
Top 69% exploitable
Prevalence
Low
niche OS-provisioning module within an enterprise endpoint platform
Social Media
2
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 0.4%
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
Yes
Human Impact
Medium

Priority Score

38
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +38
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.

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