CVE-2026-21806

CriticalCVSS 9.8/10Last modified Oct 14, 2026

Description

HCL BigFix Service Management is affected by an Administrative Session Concurrency vulnerability. The application allows multiple simultaneous authenticated sessions for the same administrative account, which could enable an unauthorized attacker to predict or hijack valid session identifiers. Successful exploitation allows an attacker to compromise affected administrative sessions and execute actions with full privileged user permissions.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-557

Affected software

No affected versions have been published.

Timeline

Published: Sep 18, 2026
Last modified: Oct 14, 2026
NVD status: Analyzed

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