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CVE-2026-21806

HCL BigFix Service Management was affected with Admin Session Concurrency vulnerability (CVE-2026-21806)

CVSS 3.1 3.1 LOWCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-21806

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-21806

Published

HCL BigFix Service Management

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "HCL Software",
                    "product": "HCL BigFix  Service Management",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "Version 27"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }

Original source record · Cite this exact observation · Complete original publisher JSON