CVE-2026-21756 describes a broken access control vulnerability in HCL Hive version 1.0. The flaw allows attackers or unauthorized users with high privileges to bypass proper privilege assignment controls, enabling them to inject unverified, malicious, or broken code into production environments. This can result in full compromise of system confidentiality, integrity, and availability. The vulnerability has a CVSS 3.1 score of 7.2 (AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H). No vendor advisory or patch information is provided, and the product is not a cloud service.

Successful exploitation can lead to complete compromise of the affected HCL Hive system, including unauthorized code execution in production environments. This impacts confidentiality, integrity, and availability at a high level. Since the vulnerability requires high privileges, attackers must already have significant access to the system to exploit it.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict high-privilege access to trusted users only and monitor for suspicious activity related to code deployment processes.