# Tanium addressed an improper certificate validation vulnerability in multiple products CVE record · `CVE-2026-121565` - **Identifiers:** `CVE-2026-121565` - **State:** Confirmed - **Severity:** CVSS 7.4 High - **Critical:** No - **CNA:** Tanium - **Weakness (CWE):** [CWE-295](https://cwe.mitre.org/data/definitions/295.html) - **Tags:** [Weak cryptography or TLS](https://agentprime.io/advisories/tag/weak-crypto.md) - **Technologies:** [Tanium TanOS](https://agentprime.io/advisories/technology/tanium-tanos.md) · [Tanium Asset](https://agentprime.io/advisories/technology/tanium-asset.md) · [Tanium Comply](https://agentprime.io/advisories/technology/tanium-comply.md) · [Tanium Connect](https://agentprime.io/advisories/technology/tanium-connect.md) · [Tanium Integrity Monitor](https://agentprime.io/advisories/technology/tanium-integrity-monitor.md) · [Tanium Health Check](https://agentprime.io/advisories/technology/tanium-health-check.md) · [Tanium Endpoint Configuration Toolset Solution](https://agentprime.io/advisories/technology/tanium-endpoint-configuration-toolset-solution.md) · [Tanium Patch](https://agentprime.io/advisories/technology/tanium-patch.md) · [Tanium Performance](https://agentprime.io/advisories/technology/tanium-performance.md) · [Tanium Reputation](https://agentprime.io/advisories/technology/tanium-reputation.md) · [Tanium Reveal](https://agentprime.io/advisories/technology/tanium-reveal.md) · [Tanium Threat Response](https://agentprime.io/advisories/technology/tanium-threat-response.md) · [Tanium Provision Host](https://agentprime.io/advisories/technology/tanium-provision-host.md) - **Published:** 3 Nov 2026 - **Updated:** 4 Nov 2026 - **Reviewed by a person:** No Published by the CVE Program (CNA: Tanium) at 3 Nov 2026, 22:17 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. ## Affected products, as the CNA wrote them - Vendor: Tanium. Product: TanOS. - affected: `1.8.5 to before 1.8.5.0326` (custom) - affected: `1.8.6 to before 1.8.6.0193` (custom) - affected: `1.9.0 to before 1.9.0.0089` (custom) - Vendor: Tanium. Product: Asset. - affected: `1.33 to before 1.33.334` (custom) - affected: `1.36 to before 1.36.182` (custom) - affected: `1.39 to before 1.39.164` (custom) - Vendor: Tanium. Product: Comply. - affected: `2.32 to before 2.32.275` (custom) - affected: `2.35 to before 2.35.337` (custom) - affected: `2.37 to before 2.37.347` (custom) - Vendor: Tanium. Product: Connect. - affected: `5.29 to before 5.29.272` (custom) - affected: `5.37 to before 5.37.177` (custom) - affected: `5.47 to before 5.47.135` (custom) - Vendor: Tanium. Product: Integrity Monitor. - affected: `3.6 to before 3.6.608` (custom) - affected: `3.7 to before 3.7.383` (custom) - affected: `3.8 to before 3.8.362` (custom) - Vendor: Tanium. Product: Health Check. - affected: `1.13 to before 1.13.653` (custom) - Vendor: Tanium. Product: Endpoint Configuration Toolset Solution. - affected: `1.51 to before 1.51.61` (custom) - affected: `1.59 to before 1.59.51` (custom) - affected: `1.71 to before 1.71.26` (custom) - Vendor: Tanium. Product: Patch. - affected: `3.24 to before 3.24.328` (custom) - affected: `3.28 to before 3.28.346` (custom) - affected: `3.32 to before 3.32.383` (custom) - Vendor: Tanium. Product: Performance. - affected: `1.25 to before 1.25.196` (custom) - Vendor: Tanium. Product: Reputation. - affected: `6.6 to before 6.6.150` (custom) - affected: `6.7 to before 6.7.143` (custom) - affected: `6.8 to before 6.8.167` (custom) - Vendor: Tanium. Product: Reveal. - affected: `2.4 to before 2.4.109` (custom) - affected: `2.5 to before 2.5.166` (custom) - Vendor: Tanium. Product: Threat Response. - affected: `4.9 to before 4.9.480` (custom) - affected: `4.12 to before 4.12.353` (custom) - affected: `4.17 to before 4.17.333` (custom) - Vendor: Tanium. Product: Provision Host. - affected: `10.4.100 to before 10.4.100` (semver) - affected: `10.8.115 to before 10.8.115` (semver) - affected: `10.9.113 to before 10.9.113` (semver) - affected: `10.10.189 to before 10.10.189` (semver) - affected: `10.11.127 to before 10.11.127` (semver) ## Not analysed yet We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter. ## Severity and exploitation - 7.4 High, CVSS 3.1: `CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N`, from CNA (Tanium) - **CISA KEV:** Not listed. - **EPSS:** 0.0016, the 5th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days. ## Timeline - 3 Nov 2026, 22:17 UTC: [Confirmed by the CVE List](https://www.cve.org/CVERecord?id=CVE-2026-121565) - 3 Nov 2026, 22:18 UTC: First seen by agentprime - 3 Nov 2026, 23:17 UTC: [Confirmed by NVD](https://nvd.nist.gov/vuln/detail/CVE-2026-121565) ## Sources - [CVE List: CVE-2026-121565](https://www.cve.org/CVERecord?id=CVE-2026-121565) - [NVD: CVE-2026-121565](https://nvd.nist.gov/vuln/detail/CVE-2026-121565) ### References from the CNA - Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description. ## Check whether this affects you This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run. - With the agentprime MCP server (), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: - As JSON: - Everything that needs attention now: --- The web page: . Everything for agents: .