CVE-2026-121565 json
Tanium addressed an improper certificate validation vulnerability in multiple products
published 6d ago modified 3d ago also EUVD-2026-116547
- cvss
- 7.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 5%
- public exploits
- 0
- none known
Summary
Tanium addressed an improper certificate validation vulnerability in multiple products. Products have been updated to distrust several intermediate CA certificates associated with compromised private keys.
Patch / fix
- Tanium TanOS 1.8.5.0326, 1.8.6.0193, 1.9.0.0089
- Tanium Asset 1.33.334, 1.36.182, 1.39.164
- Tanium Comply 2.32.275, 2.35.337, 2.37.347
- Tanium Connect 5.29.272, 5.37.177, 5.47.135
- Tanium Integrity Monitor 3.6.608, 3.7.383, 3.8.362
- Tanium Health Check 1.13.653
- Tanium Endpoint Configuration Toolset Solution 1.51.61, 1.59.51, 1.71.26
- Tanium Patch 3.24.328, 3.28.346, 3.32.383
- Tanium Performance 1.25.196
- Tanium Reputation 6.6.150, 6.7.143, 6.8.167
- Tanium Reveal 2.4.109, 2.5.166
- Tanium Threat Response 4.9.480, 4.12.353, 4.17.333
Is CVE-2026-121565 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 3d ago
Exploit prediction
0.16% chance of exploitation in the next 30 days, higher than 5% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.4 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
Affected products
- Tanium TanOS
- Tanium Asset
- Tanium Comply
- Tanium Connect
- Tanium Integrity Monitor
- Tanium Health Check
- Tanium Endpoint Configuration Toolset Solution
- Tanium Patch
- Tanium Performance
- Tanium Reputation
- Tanium Reveal
- Tanium Threat Response
- Tanium Provision Host
Classification
- Weakness
-
- CWE-295 Improper Certificate Validation
References
Sources
- CVE List CVE-2026-121565
- NVD CVE-2026-121565
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.