CVE-2026-82117 in HiRDB
Summary
by MITRE • 10/27/2026
Authentication Bypass by Spoofing Vulnerability in HiRDB.
This issue affects HiRDB Server Version 10: from 10-00 before 10-12-01; HiRDB Server Version 9: from 09-00 through 09-66-22; HiRDB Server with Additional Function Version 9: from 09-00 through 09-66/V; HiRDB Server Version 9(32): from 09-02 through 09-66-22; HiRDB Server with Additional Function Version 9(32): from 09-00 through 09-66-/V.
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Analysis
by VulDB Data Team • 10/27/2026
The vulnerability identified in Fujitsu HiRDB database management systems represents a critical authentication bypass mechanism that allows unauthorized entities to gain access by spoofing credentials or session identifiers. This flaw is inherent in the way certain versions of the HiRDB server handle connection requests and user verification processes, specifically within Version 10 prior to build 10-12-01 and various iterations of Version 9 ranging from early releases through version 9-66-22 or its variant with additional functions. The core technical deficiency lies in the insufficient validation mechanisms employed during the initial handshake phase between a client application and the database server, enabling an attacker to inject forged authentication tokens that are erroneously accepted as legitimate by the system.
From a technical perspective, this vulnerability aligns closely with CWE-287, which describes Improper Authentication, specifically manifesting as identity spoofing or session hijacking techniques where the system fails to properly verify the origin of incoming requests. The attacker exploits weaknesses in the protocol implementation that allow for the manipulation of authentication headers or parameters without requiring valid user credentials. By crafting specific network packets containing spoofed identifiers, an adversary can trick the HiRDB server into establishing a privileged session under false pretenses, effectively bypassing the intended access control layers designed to protect sensitive data repositories.
The operational impact of this vulnerability is severe due to the nature of database management systems as central hubs for organizational data integrity and availability. Successful exploitation grants attackers full administrative or elevated user privileges within the HiRDB environment, leading to potential unauthorized disclosure of confidential information, modification of critical records, or complete compromise of the underlying infrastructure. This aligns with MITRE ATT&CK technique T1078, Valid Accounts, where adversaries use legitimate credentials obtained through spoofing or other means to move laterally and persist within a network without triggering typical security alerts associated with brute force or credential stuffing attacks.
Mitigation strategies must prioritize immediate patching of all affected HiRDB instances to the latest secure versions that address these authentication validation flaws. Organizations should also implement strict network segmentation to isolate database servers from direct internet exposure, ensuring they are only accessible through trusted internal networks or secured virtual private networks. Additionally, deploying intrusion detection systems configured to recognize patterns associated with session spoofing and abnormal authentication behaviors can provide an additional layer of defense while patching efforts are underway. Regular audits of access logs for anomalous login attempts further enhance visibility into potential exploitation activities targeting this specific weakness in the HiRDB architecture.