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CVE-2025-21198: Microsoft High Performance Compute (HPC) Pack Remote Code Execution Vulnerability

• Severity: critical (CVSS 9.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-02-11 · updated 2026-06-17
• Weakness: CWE-306

Description

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

Affected products

• Microsoft Hpc Pack 2016: before 2016.3 — fixed in 2016.3
• Microsoft Hpc Pack 2019: before 6.3.8328.0 — fixed in 6.3.8328.0
• Microsoft HPC Pack 2019: from 1.0.0 before 6.3.8328.0 — fixed in 6.3.8328.0
• Microsoft Hpc Pack 2016: from 1.0.0 before 2016.3 — fixed in 2016.3

How to fix

Upgrade to a fixed version: Microsoft Hpc Pack 2016 2016.3; Microsoft Hpc Pack 2019 6.3.8328.0; Microsoft HPC Pack 2019 6.3.8328.0; Microsoft Hpc Pack 2016 2016.3. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21198

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