CVE-2026-9156Network attack vector

Service interruption via crafted network messages

Published May 27, 2026 · Updated May 27, 2026

Resource exhaustion in Tanium Server allows remote attackers to interrupt service by sending crafted messages over the network. Tanium states that the messages exhaust server file descriptors and memory but does not identify the responsible handler or erroneous operation. Network reachability is required; Tanium has not resolved conflicting statements about authentication or identified the resulting failure mode.

CVSS severity6.5
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in Tanium Server allows remote attackers to interrupt service by sending crafted messages over the network. Tanium states that the messages exhaust server file descriptors and memory but does not identify the responsible handler or erroneous operation. Network reachability is required; Tanium has not resolved conflicting statements about authentication or identified the resulting failure mode.

The record

CVE
CVE-2026-9156
Published
May 27, 2026
Updated
May 27, 2026
Vendor
Tanium
Product
Tanium Server
Classifications
CWE-772, T1499
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. May 27, 2026CVE publishedPublication date reported by the CVE source.
  2. May 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=7.6.4.0 <7.6.4.2190
  2. Affected versionversion=7.7.3.0 <7.7.3.8274
  3. Affected versionversion=7.8.2.0 <7.8.2.1176

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

Tanium · Tanium Serverversion=7.6.4.0 <7.6.4.2190; version=7.7.3.0 <7.7.3.8274; version=7.8.2.0 <7.8.2.1176

Published CVSS scores

6.5TaniumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-772Missing Release of Resource after Effective Lifetime
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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