What is CVE-2026-12139?

CVE-2026-12139 is a medium-severity vulnerability in Tanium Connect, classified under CWE-214. CVSS score: 4.4/10. Published 2026-07-21.

How severe is CVE-2026-12139?

Medium severity. CVSS v3 base score is 4.4 out of 10.

Vulnerability in Tanium Connect

CVE-2026-12139

Tanium addressed an information disclosure vulnerability in Connect.

Published 2026-07-21 · last modified 2026-08-18.

CVSS v3 metric

CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.002 (4.4th percentile), scored 2026-10-23.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 4.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.002 · change: +0.000

Affected products

Tanium Connect — versions 5.29.251, 5.37.156, 5.47.112

Weakness classification (CWE)

CWE-214

References

3938794e-25f5-4123-a1ba-5cbd7f104512 (Vendor Advisory)

Frequently asked questions

What is CVE-2026-12139?: CVE-2026-12139 is a medium-severity vulnerability in Tanium Connect, classified under CWE-214. CVSS score: 4.4/10. Published 2026-07-21.
How severe is CVE-2026-12139?: Medium severity. CVSS v3 base score is 4.4 out of 10.