Cyber Resilience

CVE-2026-9156

Medium

Published: 27 May 2026

Published
27 May 2026
Modified
29 May 2026
KEV Added
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Patch
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CVSS Score v3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
EPSS Score 0.0024 14.1th percentile
Risk Priority 13 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-9156 is a medium-severity Missing Release of Resource after Effective Lifetime (CWE-772) vulnerability in Tanium Server. Its CVSS base score is 6.5 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Application Exhaustion Flood (T1499.003); ranked at the 14.1th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

Tanium addressed a denial of service vulnerability in Tanium Server.

CWE(s)
CWE-772

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1499.003 Application Exhaustion Flood Impact
Adversaries may target resource intensive features of applications to cause a denial of service (DoS), denying availability to those applications.
attack.mitre.org →
Why these techniques?

CWE-772 resource exhaustion directly enables application-layer DoS against the Tanium Server service.

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1

Affected Assets

tanium
server
7.6.4.0 — 7.6.4.2190 · 7.7.3.0 — 7.7.3.8274 · 7.8.2.0 — 7.8.2.1176

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SC-10 Network Disconnect
addresses: CWE-772

Ensures network resources are released once the session ends or becomes inactive, closing the window for missing-release weaknesses.

References