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Findings

CVE-2026-21806

HCL BigFix Service Management is affected by an Administrative Session Concurrency vulnerability.

Published Sep 18, 2026 · updated Oct 14, 2026 · hcltech bigfix service management

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.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Sep 18, 2026 · NIST NVD

    Detected

    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 act

  2. Oct 14, 2026 · NIST NVD

    Updated

    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 act

Affected

  • cpe hcltech/bigfix service management27

Sources

  • CVE.orgVulnerability recordCVE-2026-21806

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-21806

    30-day exploitation probability 0.2%

    first.org
  • NIST NVDVulnerability recordCVE-2026-21806

    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 sessio

    nvd.nist.gov

References