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VulnerabilityPublished Updated

CVE-2025-15311: Tanium Appliance · Improper Neutralization of Escape, Meta, or Control Sequences

Affects Tanium ApplianceSource CVE Database V5

0

Not known to be exploited · CVSS 7.8 High · fixed in 1.8.5.0212 : patch Tanium Appliance soon.

Data as of 26 Oct 2026, 15:59 UTC

CVSS 3.1 base score
7.8High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 7% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 1.8.5.0212, 1.8.4.0149, 1.8.3.0146
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 5 Feb 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade Tanium Appliance to 1.8.5.0212, 1.8.4.0149 or 1.8.3.0146.

Affected software

ProductAffectedFixed in
TaniumTanium ApplianceAffected
  • >=1.8.5.0 <1.8.5.0212
Fixed in
  • 1.8.5.0212
TaniumTanium ApplianceAffected
  • >=1.8.4.0 <1.8.4.0149
Fixed in
  • 1.8.4.0149
TaniumTanium ApplianceAffected
  • >=1.8.3.0 <1.8.3.0146
Fixed in
  • 1.8.3.0146

CPE configurations (3)

  • cpe:2.3:a:tanium:tanos:1.8.3.0145:*:*:*:*:*:*:*
  • cpe:2.3:a:tanium:tanos:1.8.4.0148:*:*:*:*:*:*:*
  • cpe:2.3:a:tanium:tanos:1.8.5.0211:*:*:*:*:*:*:*

AI-suggested

1. 2. Restrict local access to Tanium Appliances to trusted administrators only, using strong authentication and network segmentation to limit exposure. 3. Implement strict access controls and monitor logs for unusual activity indicative of attempted exploitation. 4. Conduct regular security audits and vulnerability assessments on Tanium Appliances and associated infrastructure. 5. Employ application whitelisting and endpoint protection measures to detect and prevent unauthorized code execution. 6. Educate administrators about the risks of local privilege misuse and enforce the principle of least privilege. 7. Maintain up-to-date backups and incident response plans to quickly recover from potential compromises. 8. Coordinate with Tanium support and subscribe to security advisories for timely updates and guidance.

Description

Tanium addressed an unauthorized code execution vulnerability in Tanium Appliance.

References

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