Medium severity · published Oct 14, 2026
CVE-2026-86573
Out-of-bounds Write Vulnerability in Hitachi Disk Array Driver for AIX, Hitachi Disk Array Driver for Virtual I/O Server
5.1
CVSS
0.1%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H
Attack vector
Local
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
None
Integrity
Low
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 3% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HD
Hitachi Disk Array Driver for AIX · Hitachi
01-00 before 01-23-/A · source: vendor
HD
Hitachi Disk Array Driver for Virtual I/O Server · Hitachi
01-04 before 01-23-/A · source: vendor
Affected product
HD
Hitachi Disk Array Driver for AIX
Hitachi
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-86573
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-86573
www.hitachi.com
https://www.hitachi.com/products/it/software/security/info/vuls/hitachi-sec-2026-137/index.html
More from Hitachi Disk Array Driver for AIX
7.9
CVE-2026-82715
Insecure Temporary File Vulnerability in Hitachi Disk Array Driver for AIX, Hitachi Disk Array Driver for Virtual I/O Server