CVE-2026-21806: hcltech bigfix_service_management

CVSS 9.8 (critical) · published 2026-09-18

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.

Affected products (NVD): hcltech bigfix_service_management

Weakness: CWE-557

Source: NVD CVE-2026-21806

References

• https://support.hcl-software.com/csm?id=kb_article&sysparm_article=KB0133592

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