What is CVE-2026-76666?

CVE-2026-76666 is a medium-severity vulnerability in Hewlett Packard Enterprise HPE Nonstop Expand, classified under Out-of-bounds Read. CVSS score: 4.7/10. Published 2026-10-15.

How severe is CVE-2026-76666?

Medium severity. CVSS v3 base score is 4.7 out of 10.

Out-of-bounds Read in Hewlett Packard Enterprise HPE Nonstop Expand

CVE-2026-76666

A security vulnerability in HPE NonStop EXPAND may result in out-of-bounds memory read.

Vulnerability class: Buffer Overflow

Published 2026-10-15 · last modified 2026-10-15.

CVSS v3 metric

CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:L.

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

Hewlett Packard Enterprise HPE Nonstop Expand — versions T9057L02^AIG and earlier

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

support.hpe.com/hpesc/public/docDisplay

Frequently asked questions

What is CVE-2026-76666?: CVE-2026-76666 is a medium-severity vulnerability in Hewlett Packard Enterprise HPE Nonstop Expand, classified under Out-of-bounds Read. CVSS score: 4.7/10. Published 2026-10-15.
How severe is CVE-2026-76666?: Medium severity. CVSS v3 base score is 4.7 out of 10.