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CVE-2026-59124

Microsoft High Performance Computing (HPC) Pack Remote Code Execution Vulnerability

Published: Aug 11, 2026Updated: Aug 16, 2026 Sources: CVE List NVDCWE-502
9.8CRITICAL
NVD MITRE
EPSS Score
1.7%
Top 24.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

Description

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

In plain language

AI Act now

CVE-2026-59124 is a remote “run arbitrary code” flaw in Microsoft HPC Pack 2019 that can let an attacker take over your system over the network; if you use HPC Pack 2019, you should act immediately and install the fixed update.

Executive summary

CVE-2026-59124 is a remote code execution vulnerability in Microsoft HPC Pack 2019 (CWE-502 deserialization of untrusted data), where an attacker can send crafted network data to trigger code execution without needing user interaction.

If affected, business impact
Full system takeoverService outage riskData theft from compromised hostsWormable spread inside network

What to do now

  1. Check whether your organization is running Microsoft HPC Pack 2019, and note the installed version.
  2. Check whether you also have the related “windows app” component installed and note its version.
  3. If Microsoft HPC Pack 2019 is installed, upgrade it to version 6.3.8359.
  4. If the “windows app” component is installed, upgrade it to version 2.0.1314.0.
  5. If you cannot patch right away, restrict network access to HPC Pack entry points (allow only required admin/compute traffic) and closely monitor for unusual inbound requests targeting HPC services.
Patch / advisory Usually a quick update

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-502

Affected Products

Microsoft
commercial·US
Microsoft HPC Pack 2019On-prem
Operating Systems / windows
windows appOn-premDesktop App
Operating Systems / windows

Exploitability

Official Patch Available
Is your org exposed to CVE-2026-59124?We can run the check for you — a free external exposure review, no install. Check my exposure

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

3 techniques
Execution
Initial Access
View detailed technique mapping

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-59124
msrc.microsoft.com
News mentions
7

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