VulnSocial

CVE-2026-121565

LOWCVSS 7.4 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD 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.

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0.0/ 10 priority

Sources & remediation

Other references
Weakness type (CWE)
CWE-295

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Threat summary

  • 1 mentions across 1 observed day

What's happening

  • 1 total mentions across 1 day

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-11-04: 111-04
Full discourse1 post
  • Upwind Security MDR@UpwindMDR

    🚨High - Tanium Improper Certificate Validation / Trust Chain Weakening (CVE-2026-121565) Multiple Tanium components perform improper certificate validation, allowing attacker-controlled cert chains anchored on now-distrusted intermediate CAs (compromised private keys) to be accepted. This enables MITM of TLS connections and potential credential/session interception; deployments not trusting the impacted intermediates are not affected. 👉Affected: Tanium TanOS, Tanium Asset

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