CVE-2026-21821 identifies the use of an unmaintained third-party component, specifically jQuery 1.x, within HCL BigFix SCM Reporting version 11.0.5. Since jQuery 1.x is no longer supported or updated, it contains publicly known security weaknesses that can be exploited to perform client-side attacks such as Cross-Site Scripting (CWE-1104). The vulnerability has a CVSS 3.1 base score of 8.3, reflecting a high severity with network attack vector, high attack complexity, no privileges required, user interaction needed, and impacts on confidentiality, integrity, and availability. The vendor has not provided a patch or official remediation level, and the product is not a cloud service, so remediation depends on vendor updates or user mitigation.

The vulnerability exposes HCL BigFix SCM Reporting 11.0.5 to potential client-side attacks due to the use of an outdated jQuery 1.x library. Exploitation could lead to significant impacts on confidentiality, integrity, and availability of the affected system. However, exploitation requires user interaction and has high attack complexity. No known active exploits have been reported.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or patch is currently available, users should monitor HCLSoftware advisories for updates. Until a patch is released, consider mitigating client-side risks by restricting access to the reporting site, employing web application firewalls with XSS protections, or isolating the affected application environment. Avoid relying on generic mitigations unrelated to the specific vulnerability.