CVE-2026-79831

Code execution via heap buffer overflow

Published Oct 15, 2026 · Updated Oct 15, 2026

Heap overflow in HPE NonStop POSIX User Thread (PUT) Model Library allows local users to execute code via unspecified vectors. The retrieved CNA record does not disclose the affected function, triggering input, or incorrect memory operation beyond the overflow. Exploitation requires low-privileged local access without user interaction; the affected range is T1280L02^ACG and earlier.

CVSS severity6.6
Medium
EPSS probability0.11%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap overflow in HPE NonStop POSIX User Thread (PUT) Model Library allows local users to execute code via unspecified vectors. The retrieved CNA record does not disclose the affected function, triggering input, or incorrect memory operation beyond the overflow. Exploitation requires low-privileged local access without user interaction; the affected range is T1280L02^ACG and earlier.

The record

CVE
CVE-2026-79831
Published
Oct 15, 2026
Updated
Oct 15, 2026
Vendor
Hewlett Packard Enterprise
Product
HPE NonStop POSIX User Thread (PUT) Model Library
Classifications
CWE-122, CAPEC-24
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=T1280L02^ACG and earlier

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Hewlett Packard Enterprise · HPE NonStop POSIX User Thread (PUT) Model Libraryversion=T1280L02^ACG and earlier

Published CVSS scores

6.6Hewlett Packard EnterpriseCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
CAPEC-24Filter Failure through Buffer Overflow

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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