CVE-2026-121565 - Vulnerability Details - OpenCVE

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.

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00163.

Key SSVC decision points have not yet been added.

No data.

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

Link	Providers
https://security.tanium.com/TAN-2026-092

History

Tue, 03 Nov 2026 22:30:00 +0000

Type	Values Removed	Values Added
Description		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.
Title		Tanium addressed an improper certificate validation vulnerability in multiple products
Weaknesses		CWE-295
References		https://security.tanium.com/TAN-2026-092
Metrics		cvssV3_1 `{'score': 7.4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N'}`

Projects

Sign in to view the affected projects.

MITRE

Status: PUBLISHED

Assigner: Tanium

Published: 2026-11-03T22:17:22.997Z

Updated: 2026-11-04T11:24:05.622Z

Reserved: 2026-11-03T14:58:47.328Z

Link: CVE-2026-121565

Vulnrichment

No data.

NVD

Status : Awaiting Analysis

Published: 2026-11-03T23:17:35.080

Modified: 2026-11-04T12:17:06.410

Link: CVE-2026-121565

Redhat

No data.

OpenCVE Enrichment

Updated: 2026-11-04T09:00:16Z

Weaknesses

CWE-295

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-121565", "assignerOrgId": "3938794e-25f5-4123-a1ba-5cbd7f104512", "state": "PUBLISHED", "assignerShortName": "Tanium", "dateReserved": "2026-11-03T14:58:47.328Z", "datePublished": "2026-11-03T22:17:22.997Z", "dateUpdated": "2026-11-04T11:24:05.622Z"}, "containers": {"cna": {"affected": [{"product": "TanOS", "vendor": "Tanium", "versions": [{"version": "1.8.5", "status": "affected", "lessThan": "1.8.5.0326", "versionType": "custom"}, {"version": "1.8.6", "status": "affected", "lessThan": "1.8.6.0193", "versionType": "custom"}, {"version": "1.9.0", "status": "affected", "lessThan": "1.9.0.0089", "versionType": "custom"}]}, {"product": "Asset", "vendor": "Tanium", "versions": [{"version": "1.33", "status": "affected", "lessThan": "1.33.334", "versionType": "custom"}, {"version": "1.36", "status": "affected", "lessThan": "1.36.182", "versionType": "custom"}, {"version": "1.39", "status": "affected", "lessThan": "1.39.164", "versionType": "custom"}]}, {"product": "Comply", "vendor": "Tanium", "versions": [{"version": "2.32", "status": "affected", "lessThan": "2.32.275", "versionType": "custom"}, {"version": "2.35", "status": "affected", "lessThan": "2.35.337", "versionType": "custom"}, {"version": "2.37", "status": "affected", "lessThan": "2.37.347", "versionType": "custom"}]}, {"product": "Connect", "vendor": "Tanium", "versions": [{"version": "5.29", "status": "affected", "lessThan": "5.29.272", "versionType": "custom"}, {"version": "5.37", "status": "affected", "lessThan": "5.37.177", "versionType": "custom"}, {"version": "5.47", "status": "affected", "lessThan": "5.47.135", "versionType": "custom"}]}, {"product": "Integrity Monitor", "vendor": "Tanium", "versions": [{"version": "3.6", "status": "affected", "lessThan": "3.6.608", "versionType": "custom"}, {"version": "3.7", "status": "affected", "lessThan": "3.7.383", "versionType": "custom"}, {"version": "3.8", "status": "affected", "lessThan": "3.8.362", "versionType": "custom"}]}, {"product": "Health Check", "vendor": "Tanium", "versions": [{"version": "1.13", "status": "affected", "lessThan": "1.13.653", "versionType": "custom"}]}, {"product": "Endpoint Configuration Toolset Solution", "vendor": "Tanium", "versions": [{"version": "1.51", "status": "affected", "lessThan": "1.51.61", "versionType": "custom"}, {"version": "1.59", "status": "affected", "lessThan": "1.59.51", "versionType": "custom"}, {"version": "1.71", "status": "affected", "lessThan": "1.71.26", "versionType": "custom"}]}, {"product": "Patch", "vendor": "Tanium", "versions": [{"version": "3.24", "status": "affected", "lessThan": "3.24.328", "versionType": "custom"}, {"version": "3.28", "status": "affected", "lessThan": "3.28.346", "versionType": "custom"}, {"version": "3.32", "status": "affected", "lessThan": "3.32.383", "versionType": "custom"}]}, {"product": "Performance", "vendor": "Tanium", "versions": [{"version": "1.25", "status": "affected", "lessThan": "1.25.196", "versionType": "custom"}]}, {"product": "Reputation", "vendor": "Tanium", "versions": [{"version": "6.6", "status": "affected", "lessThan": "6.6.150", "versionType": "custom"}, {"version": "6.7", "status": "affected", "lessThan": "6.7.143", "versionType": "custom"}, {"version": "6.8", "status": "affected", "lessThan": "6.8.167", "versionType": "custom"}]}, {"product": "Reveal", "vendor": "Tanium", "versions": [{"version": "2.4", "status": "affected", "lessThan": "2.4.109", "versionType": "custom"}, {"version": "2.5", "status": "affected", "lessThan": "2.5.166", "versionType": "custom"}]}, {"product": "Threat Response", "vendor": "Tanium", "versions": [{"version": "4.9", "status": "affected", "lessThan": "4.9.480", "versionType": "custom"}, {"version": "4.12", "status": "affected", "lessThan": "4.12.353", "versionType": "custom"}, {"version": "4.17", "status": "affected", "lessThan": "4.17.333", "versionType": "custom"}]}, {"product": "Provision Host", "vendor": "Tanium", "versions": [{"version": "10.4.100", "status": "affected", "lessThan": "10.4.100", "versionType": "semver"}, {"version": "10.8.115", "status": "affected", "lessThan": "10.8.115", "versionType": "semver"}, {"version": "10.9.113", "status": "affected", "lessThan": "10.9.113", "versionType": "semver"}, {"version": "10.10.189", "status": "affected", "lessThan": "10.10.189", "versionType": "semver"}, {"version": "10.11.127", "status": "affected", "lessThan": "10.11.127", "versionType": "semver"}]}], "dateAssigned": "2026-11-03T14:58:46.819Z", "datePublic": "2026-11-03T22:12:11.458Z", "descriptions": [{"lang": "en", "value": "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."}], "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 7.4, "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-295", "description": "Improper Certificate Validation", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "3938794e-25f5-4123-a1ba-5cbd7f104512", "shortName": "Tanium", "dateUpdated": "2026-11-04T11:24:05.622Z"}, "references": [{"name": "TAN-2026-092", "url": "https://security.tanium.com/TAN-2026-092"}], "title": "Tanium addressed an improper certificate validation vulnerability in multiple products"}}}

{"affected": [{"affectedData": [{"product": "TanOS", "vendor": "Tanium", "versions": [{"lessThan": "1.8.5.0326", "status": "affected", "version": "1.8.5", "versionType": "custom"}, {"lessThan": "1.8.6.0193", "status": "affected", "version": "1.8.6", "versionType": "custom"}, {"lessThan": "1.9.0.0089", "status": "affected", "version": "1.9.0", "versionType": "custom"}]}, {"product": "Asset", "vendor": "Tanium", "versions": [{"lessThan": "1.33.334", "status": "affected", "version": "1.33", "versionType": "custom"}, {"lessThan": "1.36.182", "status": "affected", "version": "1.36", "versionType": "custom"}, {"lessThan": "1.39.164", "status": "affected", "version": "1.39", "versionType": "custom"}]}, {"product": "Comply", "vendor": "Tanium", "versions": [{"lessThan": "2.32.275", "status": "affected", "version": "2.32", "versionType": "custom"}, {"lessThan": "2.35.337", "status": "affected", "version": "2.35", "versionType": "custom"}, {"lessThan": "2.37.347", "status": "affected", "version": "2.37", "versionType": "custom"}]}, {"product": "Connect", "vendor": "Tanium", "versions": [{"lessThan": "5.29.272", "status": "affected", "version": "5.29", "versionType": "custom"}, {"lessThan": "5.37.177", "status": "affected", "version": "5.37", "versionType": "custom"}, {"lessThan": "5.47.135", "status": "affected", "version": "5.47", "versionType": "custom"}]}, {"product": "Integrity Monitor", "vendor": "Tanium", "versions": [{"lessThan": "3.6.608", "status": "affected", "version": "3.6", "versionType": "custom"}, {"lessThan": "3.7.383", "status": "affected", "version": "3.7", "versionType": "custom"}, {"lessThan": "3.8.362", "status": "affected", "version": "3.8", "versionType": "custom"}]}, {"product": "Health Check", "vendor": "Tanium", "versions": [{"lessThan": "1.13.653", "status": "affected", "version": "1.13", "versionType": "custom"}]}, {"product": "Endpoint Configuration Toolset Solution", "vendor": "Tanium", "versions": [{"lessThan": "1.51.61", "status": "affected", "version": "1.51", "versionType": "custom"}, {"lessThan": "1.59.51", "status": "affected", "version": "1.59", "versionType": "custom"}, {"lessThan": "1.71.26", "status": "affected", "version": "1.71", "versionType": "custom"}]}, {"product": "Patch", "vendor": "Tanium", "versions": [{"lessThan": "3.24.328", "status": "affected", "version": "3.24", "versionType": "custom"}, {"lessThan": "3.28.346", "status": "affected", "version": "3.28", "versionType": "custom"}, {"lessThan": "3.32.383", "status": "affected", "version": "3.32", "versionType": "custom"}]}, {"product": "Performance", "vendor": "Tanium", "versions": [{"lessThan": "1.25.196", "status": "affected", "version": "1.25", "versionType": "custom"}]}, {"product": "Reputation", "vendor": "Tanium", "versions": [{"lessThan": "6.6.150", "status": "affected", "version": "6.6", "versionType": "custom"}, {"lessThan": "6.7.143", "status": "affected", "version": "6.7", "versionType": "custom"}, {"lessThan": "6.8.167", "status": "affected", "version": "6.8", "versionType": "custom"}]}, {"product": "Reveal", "vendor": "Tanium", "versions": [{"lessThan": "2.4.109", "status": "affected", "version": "2.4", "versionType": "custom"}, {"lessThan": "2.5.166", "status": "affected", "version": "2.5", "versionType": "custom"}]}, {"product": "Threat Response", "vendor": "Tanium", "versions": [{"lessThan": "4.9.480", "status": "affected", "version": "4.9", "versionType": "custom"}, {"lessThan": "4.12.353", "status": "affected", "version": "4.12", "versionType": "custom"}, {"lessThan": "4.17.333", "status": "affected", "version": "4.17", "versionType": "custom"}]}, {"product": "Provision Host", "vendor": "Tanium", "versions": [{"lessThan": "10.4.100", "status": "affected", "version": "10.4.100", "versionType": "semver"}, {"lessThan": "10.8.115", "status": "affected", "version": "10.8.115", "versionType": "semver"}, {"lessThan": "10.9.113", "status": "affected", "version": "10.9.113", "versionType": "semver"}, {"lessThan": "10.10.189", "status": "affected", "version": "10.10.189", "versionType": "semver"}, {"lessThan": "10.11.127", "status": "affected", "version": "10.11.127", "versionType": "semver"}]}], "source": "3938794e-25f5-4123-a1ba-5cbd7f104512"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-121565", "lastModified": "2026-11-04T12:17:06.410", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.4, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 5.2, "source": "3938794e-25f5-4123-a1ba-5cbd7f104512", "type": "Secondary"}]}, "published": "2026-11-03T23:17:35.080", "references": [{"source": "3938794e-25f5-4123-a1ba-5cbd7f104512", "url": "https://security.tanium.com/TAN-2026-092"}], "sourceIdentifier": "3938794e-25f5-4123-a1ba-5cbd7f104512", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-295"}], "source": "3938794e-25f5-4123-a1ba-5cbd7f104512", "type": "Secondary"}]}