Cyber Resilience

CVE-2025-15342

Access Control in Tanium Reputation 6.3.0 – 6.3.227

Access Control
Published
05 February 2026
Modified
10 February 2026
Patch / advisory
View advisory
CVSS Score v3.1 4.3
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
EPSS Score 0.0021 11th percentile
Risk Priority 35 floored blend · peak EPSS

Summary

CVE-2025-15342 is a medium-severity Incorrect Authorization (CWE-863) vulnerability in Tanium Reputation. Its CVSS base score is 4.3 (Medium).

Operationally, ranked at the 11th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to AC-25 (Reference Monitor) and AC-3 (Access Enforcement) — see the control section below for these in your framework.

OWASP Top 10 for Web (2025)

A01:2025 Broken Access Control

EU & UK References

Vulnerability Data

Tanium addressed an improper access controls vulnerability in Reputation.

CWE(s)
CWE-863

Related Threats

CVEs Like This One

CVE-2025-15288Same vendor: Tanium
CVE-2025-15322Same vendor: Tanium
CVE-2025-15321Same vendor: Tanium
CVE-2025-15336Same vendor: Tanium
CVE-2026-2605Same vendor: Tanium
CVE-2026-0925Same vendor: Tanium
CVE-2025-15338Same vendor: Tanium
CVE-2025-15317Same vendor: Tanium
CVE-2025-15324Same vendor: Tanium
CVE-2025-15314Same vendor: Tanium

Affected Assets

tanium
reputation
6.3.0 — 6.3.227 · 6.5.0 — 6.5.50 · 6.6.0 — 6.6.72

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)
  • AC-3 Access Enforcement
  • AC-25 Reference Monitor
  • AC-6 Least Privilege
Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)
  • 5 hardening rules · 3 OS baselines
Validate
Prove the fix (OWASP ASVS)

—

Mitigating Controls (NIST 800-53 r5) AI

AC-3 Access Enforcement good match
prevent

Directly enforces correct authorization checks before allowing access to Reputation data or functions, preventing the CWE-863 flaw.

AC-25 Reference Monitor good match
prevent

Requires a tamper-proof reference monitor to mediate all authorization decisions, eliminating incorrect access logic in the affected component.

AC-6 Least Privilege partial match
prevent

Limits privileges granted to users and processes, reducing the impact surface of any residual improper authorization checks.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.AA-05 mostly match
prevents

Defining, enforcing, and reviewing access authorizations and least privilege directly prevents incorrect authorization checks.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.5.15 Access control partial match
prevents

Requiring consistency between access rights and classification plus formal approval steps ensures that the authorization logic correctly distinguishes between entities that should and should not be granted access.

A.5.18 Access rights partial match
prevents

Enforcing policy-driven approval and role-change reviews stops incorrect or stale authorization decisions from remaining in effect after job changes or terminations.

A.8.3 Information access restriction partial match
prevents

By tying access rights to identity, device, location and classification, the control reduces the likelihood that an authorization decision will be based on an incorrect or bypassed policy.

References