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VulnerabilityPublished Updated

CVE-2025-15312: Tanium Appliance · Improper Encoding or Escaping of Output

Affects Tanium ApplianceSource CVE Database V5

0

Not known to be exploited · CVSS 6.6 Medium : upgrade to 1.8.4.0157 or 1.8.3.0146 when convenient.

Data as of 26 Oct 2026, 17:16 UTC

CVSS 3.1 base score
6.6Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.3% chance of exploitation in 30 days – higher than 31% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 1.8.4.0157, 1.8.3.0146
CVSS:3.1/AV:N/AC:H/PR:H/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 1.8.4.0157 or 1.8.3.0146.

Affected software

ProductAffectedFixed in
TaniumTanium ApplianceAffected
  • >=1.8.4.0 <1.8.4.0157
Fixed in
  • 1.8.4.0157
TaniumTanium ApplianceAffected
  • >=1.8.3.0 <1.8.3.0146
Fixed in
  • 1.8.3.0146

CPE configurations (2)

  • cpe:2.3:a:tanium:tanos:1.8.3.0145:*:*:*:*:*:*:*
  • cpe:2.3:a:tanium:tanos:1.8.4.0156:*:*:*:*:*:*:*

AI-suggested

European organizations should implement a multi-layered mitigation strategy for CVE-2025-15312. First and foremost, they must monitor Tanium vendor communications for official patches or updates addressing this vulnerability and apply them promptly once available. Until patches are deployed, restrict network access to Tanium Appliances to trusted administrative hosts only, using network segmentation and firewall rules to minimize exposure. Enforce strict access controls and multi-factor authentication for all administrative accounts to reduce the risk of privilege escalation or misuse. Conduct thorough audits of existing privileges and remove unnecessary administrative rights. Implement continuous monitoring and logging of Tanium Appliance activities to detect anomalous behavior indicative of exploitation attempts. Additionally, review and harden output handling configurations if possible, and ensure secure coding practices are followed in any custom integrations or scripts interacting with the appliance. Regularly train security personnel on emerging threats and incident response procedures related to Tanium Appliances. Finally, consider deploying intrusion detection or prevention systems tuned to detect exploitation patterns related to output encoding vulnerabilities.

Description

Tanium addressed an improper output sanitization vulnerability in Tanium Appliance.

References

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