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    CVE-2026-21840

    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.

    Published:Jul 14, 2026
    Last Modified:Aug 2, 2026
    EPS:Jul 14, 2026
    EPSS Score:0.00153
    CVSS Score:3.1

    Affected Products

    Vendor
    Hcltech
    Product
    Bigfix Platform

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-208 Observable Timing Discrepancy

    Related CVEs

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    CVE-2026-21765 (CVSS 8.8) — HCL BigFix Platform is affected by insecure permissions on private cryptographic keys.  The private cryptograp…
    CVE-2024-42193 (CVSS 2.1) — HCL BigFix Web Reports' service communicates over HTTPS but exhibits a weakness in its handling of SSL certifi…
    CVE-2024-42189 (CVSS 5.6) — HCL BigFix Web Reports might be subject to a Denial of Service (DoS) attack, due to a potentially weak validat…
    CVE-2024-42200 (CVSS 4.8) — HCL BigFix Web Reports might be subject to a Stored Cross-Site Scripting (XSS) attack, due to a potentially we…
    CVE-2024-30117 (CVSS 2.5) — A dynamic search for a prerequisite library could allow the possibility for an attacker to replace the correct…
    CVE-2024-23556 (CVSS 5.9) — SSL/TLS Renegotiation functionality potentially leading to DoS attack vulnerability. …
    CVE-2024-23554 (CVSS 5.7) — Cross-Site Request Forgery (CSRF) on Session Token vulnerability that could potentially lead to Remote Code Ex…
    CVE-2024-23583 (CVSS 6.7) — An attacker could potentially intercept credentials via the task manager and perform unauthorized access to th…
    CVE-2023-45715 (CVSS 3.5) — The console may experience a service interruption when processing file names with invalid characters. …

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High