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

No data.

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

Vendors	Products

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'}`

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

Updated: 2026-07-16T01:30:04Z

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-21840", "assignerOrgId": "1e47fe04-f25f-42fa-b674-36de2c5e3cfc", "state": "PUBLISHED", "assignerShortName": "HCL", "dateReserved": "2026-01-05T16:08:25.001Z", "datePublished": "2026-07-14T21:36:52.776Z", "dateUpdated": "2026-07-15T12:46:19.073Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "1e47fe04-f25f-42fa-b674-36de2c5e3cfc", "shortName": "HCL", "dateUpdated": "2026-07-14T21:36:52.776Z"}, "title": "HCL BigFix Platform is affected by a user enumeration vulnerability", "datePublic": "2026-07-14T21:36:00.000Z", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-208", "description": "CWE-208 Observable timing discrepancy", "type": "CWE"}]}], "affected": [{"vendor": "HCLSoftware", "product": "HCL BigFix Platform", "versions": [{"status": "affected", "version": "10.0.0 - 10.0.15, 11.0.0 - 11.0.5"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "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.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>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. </p>"}]}], "references": [{"url": "https://support.hcl-software.com/csm?id=kb_article&sysparm_article=KB0132093"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE", "baseSeverity": "LOW", "baseScore": 3.1, "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N"}}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "Vulnogram 1.0.2"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-07-15T12:45:19.795768Z", "id": "CVE-2026-21840", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-15T12:46:19.073Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-21840", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-15T12:45:19.795768Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-15T12:45:26.341Z"}}], "cna": {"title": "HCL BigFix Platform is affected by a user enumeration vulnerability", "source": {"discovery": "UNKNOWN"}, "metrics": [{"format": "CVSS", "cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 3.1, "attackVector": "NETWORK", "baseSeverity": "LOW", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"vendor": "HCLSoftware", "product": "HCL BigFix Platform", "versions": [{"status": "affected", "version": "10.0.0 - 10.0.15, 11.0.0 - 11.0.5"}], "defaultStatus": "unaffected"}], "datePublic": "2026-07-14T21:36:00.000Z", "references": [{"url": "https://support.hcl-software.com/csm?id=kb_article&sysparm_article=KB0132093"}], "x_generator": {"engine": "Vulnogram 1.0.2"}, "descriptions": [{"lang": "en", "value": "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.", "supportingMedia": [{"type": "text/html", "value": "<p>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. </p>", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-208", "description": "CWE-208 Observable timing discrepancy"}]}], "providerMetadata": {"orgId": "1e47fe04-f25f-42fa-b674-36de2c5e3cfc", "shortName": "HCL", "dateUpdated": "2026-07-14T21:36:52.776Z"}}}, "cveMetadata": {"cveId": "CVE-2026-21840", "state": "PUBLISHED", "dateUpdated": "2026-07-15T12:46:19.073Z", "dateReserved": "2026-01-05T16:08:25.001Z", "assignerOrgId": "1e47fe04-f25f-42fa-b674-36de2c5e3cfc", "datePublished": "2026-07-14T21:36:52.776Z", "assignerShortName": "HCL"}, "dataVersion": "5.2"}