Medium severity · published Oct 15, 2026
CVE-2026-79831
HPE NonStop Posix User Threads - Heap buffer overflow vulnerability
6.6
CVSS
0.1%
EPSS
No
On KEV
Description
A heap buffer overflow in HPE NonStop Posix User Threads may allow arbitrary code execution.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 1% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HN
HPE NonStop Posix User Threads · Hewlett Packard Enterprise
T1280L02^ACG and earlier · source: vendor
Affected product
HN
HPE NonStop Posix User Threads
Hewlett Packard Enterprise