CVE-2026-59124: Microsoft High Performance Computing (HPC) Pack Remote Code Execution Vulnerability

Overview

Severity

Critical (CVSS 9.8)

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Category

Remote Code Execution

Exploit Status

Not Exploited

Exploitation Likelihood

More Likely

Patch Tuesday

2026-Aug

Released

2026-08-11

Last Updated

2026-08-16

EPSS Score

1.53% (percentile: 73.7%)

Description

Deserialization of untrusted data in Microsoft High Performance Computing (HPC) Pack allows an unauthorized attacker to execute code over a network.

FAQ

How could an attacker exploit this vulnerability? An attacker could exploit this vulnerability by submitting a specially crafted payload to an affected service that deserializes untrusted data. Successful exploitation could allow the attacker to execute code on the target system.

Affected Products (1)

Azure

• Microsoft HPC Pack 2019

Security Updates (1)

• Release Notes

Acknowledgments

P1hcn

Revision History

• 2026-08-11: Information published.
• 2026-08-16: Corrected the listed software in the Security Updates table. Microsoft recommends installing the security update as soon as possible.