Vulnerability · Published Oct 14, 2026 · Assigned by Hitachi
CVE-2026-86573Out-of-bounds Write Vulnerability in Hitachi Disk Array Driver for AIX, Hitachi Disk Array Driver for Virtual I/O Server
Medium 5.1
In plain English
A medium-severity out-of-bounds write in Hitachi Disk Array Driver for AIX from Hitachi. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities).
Severity (CVSS 3.1)5.1Medium
Exploit odds (30 days)0.1%top 97.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Hitachi | Hitachi Disk Array Driver for AIX | 01-00 – before 01-23-/A |
| Hitachi | Hitachi Disk Array Driver for Virtual I/O Server | 01-04 – before 01-23-/A |
Weakness: CWE-787 · Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H