CVE-2026-82118: Hitachi HiRDB stack-based buffer overflow

CVE-2026-82118 · Severity: critical · CVSS 9.8 · Published 2026-10-27

HiRDB is a enterprise relational database system used for business-critical applications. A stack-based buffer overflow vulnerability allows remote attackers to execute arbitrary code or crash the database server without authentication, resulting in potential data breach, data corruption, or complete service outage. The vulnerability affects multiple versions of HiRDB Server on multiple platforms.

Technologies: Hitachi HiRDB Server Version 10, Hitachi HiRDB Server Version 9, Hitachi HiRDB Server Version 9(32), Hitachi HiRDB Server with Additional Function Version 9, Hitachi HiRDB Server with Additional Function Version 9(32). Vendors: Hitachi.

Quick answers

Is CVE-2026-82118 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-82118 being exploited in the wild.
How severe is CVE-2026-82118?
Critical severity, with a CVSS score of 9.8, published 27 October 2026.
Which products and versions are affected?
Hitachi HiRDB Server Version 10 10-00 through 10-12 (all platforms: AIX, HP-UX, Linux, Windows); Hitachi HiRDB Server Version 9 09-00 through 09-66-22 (all platforms: AIX, HP-UX, Solaris, Linux, Windows); Hitachi HiRDB Server Version 9(32) 09-02 through 09-66-22 (Windows); Hitachi HiRDB Server with Additional Function Version 9 09-00 through 09-66-/V (all platforms: AIX, HP-UX, Linux, Windows); and 1 more.
Is there a fix for CVE-2026-82118?
Yes: fixed in HiRDB Server Version 10: 10-12-01, 10-11-02, 10-08-05 (AIX, Linux, Windows). Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-82118 attacked?
It is attacked over the network, in a hosted service.
Am I affected by CVE-2026-82118?
Check whether you run Hitachi HiRDB Server Version 10, Hitachi HiRDB Server Version 9, Hitachi HiRDB Server Version 9(32) or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • Fixed in: HiRDB Server Version 10: 10-12-01, 10-11-02, 10-08-05 (AIX, Linux, Windows)

Technical details

A stack-based buffer overflow exists in HiRDB Server that can be triggered remotely over the network with no authentication required. An attacker can send specially crafted network packets to overflow a stack buffer, potentially achieving remote code execution or denial of service. The vulnerability affects HiRDB versions 9 and 10 across AIX, HP-UX, Linux, Solaris, and Windows platforms.

Affected products

  • Hitachi HiRDB Server Version 10 10-00 through 10-12 (all platforms: AIX, HP-UX, Linux, Windows)
  • Hitachi HiRDB Server Version 9 09-00 through 09-66-22 (all platforms: AIX, HP-UX, Solaris, Linux, Windows)
  • Hitachi HiRDB Server with Additional Function Version 9 09-00 through 09-66-/V (all platforms: AIX, HP-UX, Linux, Windows)
  • Hitachi HiRDB Server Version 9(32) 09-02 through 09-66-22 (Windows)
  • Hitachi HiRDB Server with Additional Function Version 9(32) 09-00 through 09-66-/V (Windows)

Timeline

  • 2026-10-27: disclosed

References

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