HPE NonStop Posix User Threads - Heap buffer overflow vulnerability

published 2026-10-15 25 d ago modified 2026-10-15 24 d ago also EUVD-2026-102002

cvss: 6.6; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.1%; EPSS 0.1% chance of exploitation in 30 days, percentile 1%
public exploits: 0; none known

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

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 25 d ago (2026-10-15)

Exploit prediction

0.11% chance of exploitation in the next 30 days, higher than 1% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	6.6	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H

Affected products

Hewlett Packard Enterprise HPE NonStop Posix User Threads

Classification

Weakness

CWE-122 Heap-based Buffer Overflow

References

support.hpe.com /hpesc/public/docDisplay?docId=hpesbns05148en_us&docLocale=en_US

Sources

CVE List CVE-2026-79831
NVD CVE-2026-79831

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary