What is CVE-2026-82118?

CVE-2026-82118 is a critical-severity vulnerability, classified under Stack-based Buffer Overflow. CVSS score: 9.8/10. Published 2026-10-27.

How severe is CVE-2026-82118?

Critical severity. CVSS v3 base score is 9.8 out of 10.

CVE-2026-82118

CVE-2026-82118

Stack-based Buffer Overflow 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.

Vulnerability class: Buffer Overflow

Published 2026-10-27 · last modified 2026-10-27.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (43.9th percentile), scored 2026-10-28.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 43.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

The 30-day trend appears once there are two daily scores.

Weakness classification (CWE)

CWE-121 — Stack-based Buffer Overflow

References

www.hitachi.com/products/it/software/security/info/vuls/hitachi-sec-2026-147/in… (vendor-advisory)

Frequently asked questions

What is CVE-2026-82118?: CVE-2026-82118 is a critical-severity vulnerability, classified under Stack-based Buffer Overflow. CVSS score: 9.8/10. Published 2026-10-27.
How severe is CVE-2026-82118?: Critical severity. CVSS v3 base score is 9.8 out of 10.