A critical vulnerability identified as CVE-2026-82116 affects multiple versions of HiRDB Server. The flaw involves missing authentication for critical functions, allowing unauthenticated attackers to potentially execute unauthorized actions. The vulnerability has a high CVSS score of 9.8, indicating severe impact on confidentiality, integrity, and availability. Affected versions include HiRDB Server Version 10 from 10-00 before 10-12-01, and various releases of Version 9 and its variants up to specified builds. No patch or remediation information is currently provided.