CVE-2026-9156 | Tanium addressed a denial of service vulnerability in Tanium Server.

Tanium addressed a denial of service vulnerability in Tanium Server.

Published: 2026-05-27 Last update: 2026-05-29 Assigner: 3938794e-25f5-4123-a1ba-5cbd7f104512 Source: 3938794e-25f5-4123-a1ba-5cbd7f104512
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-9156 is rated Low Risk (29/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.03%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-9156

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-27 — 0.03% —

Full EPSS history (1 record total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-9156

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 2.8 3.6 3938794e-25f5-4123-a1ba-5cbd7f104512
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]

Weakness enumeration for CVE-2026-9156

GitHub Security Advisory for CVE-2026-9156

GHSA-8987-p6rf-jvmc · Severity: medium — Tanium addressed a denial of service vulnerability in Tanium Server.

Affected software / configurations for CVE-2026-9156

Vendor Product Version Raw CPE
tanium server >= 7.6.4.0, < 7.6.4.2190 cpe:2.3:a:tanium:server:*:*:*:*:*:*:*:*
tanium server >= 7.7.3.0, < 7.7.3.8274 cpe:2.3:a:tanium:server:*:*:*:*:*:*:*:*
tanium server >= 7.8.2.0, < 7.8.2.1176 cpe:2.3:a:tanium:server:*:*:*:*:*:*:*:*

References for CVE-2026-9156

URL Tags
https://security.tanium.com/TAN-2026-013 Vendor Advisory
cvelogic Threat Intelligence