What is CVE-2026-86573?

CVE-2026-86573 is a medium-severity vulnerability in Hitachi Disk Array Driver For Aix, classified under Out-of-bounds Write. CVSS score: 5.1/10. Published 2026-10-14.

How severe is CVE-2026-86573?

Medium severity. CVSS v3 base score is 5.1 out of 10.

Buffer overflow in Hitachi Disk Array Driver For Aix

CVE-2026-86573

Out-of-bounds write vulnerability in Hitachi Disk Array Driver for AIX and Hitachi Disk Array Driver for Virtual I/O Server. This issue affects Hitachi Disk Array Driver for AIX: from 01-00 before 01-23-/A; Hitachi Disk Array Driver for Virtual I/O Server: from 01-04 before 01-23-/A.

Vulnerability class: Buffer Overflow

Published 2026-10-14.

CVSS v3 metric

CVSS v3 base score 5.1 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

www.hitachi.com/products/it/software/security/info/vuls/hitachi-sec-2026-137/in…

Frequently asked questions

What is CVE-2026-86573?: CVE-2026-86573 is a medium-severity vulnerability in Hitachi Disk Array Driver For Aix, classified under Out-of-bounds Write. CVSS score: 5.1/10. Published 2026-10-14.
How severe is CVE-2026-86573?: Medium severity. CVSS v3 base score is 5.1 out of 10.