What is CVE-2026-79831?

CVE-2026-79831 is a medium-severity vulnerability in Hewlett Packard Enterprise HPE Nonstop Posix User Threads, classified under Heap-based Buffer Overflow. CVSS score: 6.6/10. Published 2026-10-15.

How severe is CVE-2026-79831?

Medium severity. CVSS v3 base score is 6.6 out of 10.

Buffer overflow in Hewlett Packard Enterprise HPE Nonstop Posix User Threads

CVE-2026-79831

A heap buffer overflow in HPE NonStop Posix User Threads may allow arbitrary code execution.

Vulnerability class: Buffer Overflow

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

CVSS v3 metric

CVSS v3 base score 6.6 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/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

Hewlett Packard Enterprise HPE Nonstop Posix User Threads — versions T1280L02^ACG and earlier

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

support.hpe.com/hpesc/public/docDisplay

Frequently asked questions

What is CVE-2026-79831?: CVE-2026-79831 is a medium-severity vulnerability in Hewlett Packard Enterprise HPE Nonstop Posix User Threads, classified under Heap-based Buffer Overflow. CVSS score: 6.6/10. Published 2026-10-15.
How severe is CVE-2026-79831?: Medium severity. CVSS v3 base score is 6.6 out of 10.