CVE-2026-21840 - Vulnerability Details - OpenCVE

HCL BigFix Platform is affected by a user enumeration vulnerability which might allow an attacker, through careful system control and response time monitoring, to perform some level of user enumeration for the BigFix service.

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact None

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 0.00153.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

HCLSoftware

HCL BigFix Platform

unaffected

Version	Status	Constraints
`10.0.0 - 10.0.15, 11.0.0 - 11.0.5`	affected	—

No data.

No data.

No data.

Project Subscriptions

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://support.hcl-software.com/csm?id=kb_article&sysparm_article=KB0132093

History

Wed, 15 Jul 2026 13:30:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Tue, 14 Jul 2026 22:00:00 +0000

Type	Values Removed	Values Added
Description		HCL BigFix Platform is affected by a user enumeration vulnerability which might allow an attacker, through careful system control and response time monitoring, to perform some level of user enumeration for the BigFix service.
Title		HCL BigFix Platform is affected by a user enumeration vulnerability
Weaknesses		CWE-208
References		https://support.hcl-software.com/csm?id=kb_article&sysparm_article=KB0132093
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'}`

Projects

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MITRE

Status: PUBLISHED

Assigner: HCL

Published: 2026-07-14T21:36:52.776Z

Updated: 2026-07-15T12:46:19.073Z

Reserved: 2026-01-05T16:08:25.001Z

Link: CVE-2026-21840

Vulnrichment

Updated: 2026-07-15T12:45:26.341Z

NVD

No data.

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-208

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