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.
History

Wed, 14 Oct 2026 17:45:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:hcltech:bigfix_service_management:27:-:*:*:*:*:*:*

Sat, 19 Sep 2026 22:30:00 +0000

Type Values Removed Values Added
First Time appeared Hcltech
Hcltech bigfix Service Management
Vendors & Products Hcltech
Hcltech bigfix Service Management

Fri, 18 Sep 2026 21:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 18 Sep 2026 11:15:00 +0000

Type Values Removed Values Added
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.
Title HCL BigFix Service Management was affected with Admin Session Concurrency vulnerability (CVE-2026-21806)
Weaknesses CWE-557
References
Metrics cvssV3_1

{'score': 3.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: HCL

Published: 2026-09-18T11:12:24.764Z

Updated: 2026-09-18T19:07:27.165Z

Reserved: 2026-01-05T16:08:06.682Z

Link: CVE-2026-21806

cve-icon Vulnrichment

Updated: 2026-09-18T19:07:17.729Z

cve-icon NVD

Status : Analyzed

Published: 2026-09-18T12:17:24.440

Modified: 2026-10-14T17:36:23.717

Link: CVE-2026-21806

cve-icon Redhat

No data.