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

Q: How do I fix CVE-2025-21198?

hpc pack 2016: upgrade to 2016.3; hpc pack 2019: upgrade to 6.3.8328.0. Exact commands for each OS are on this page.

Q: Is CVE-2025-21198 being exploited?

CVE-2025-21198 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-21198 affect?

CVE-2025-21198 affects hpc pack 2016, hpc pack 2019. Severity is critical (CVSS 9.0). Microsoft High Performance Compute (HPC) Pack Remote Code Execution Vulnerability

Q: How urgent is CVE-2025-21198?

Priority 52/100. Critical severity; On your watchlist

This month

CRITICAL 9.0WATCHLISTUPGRADEUPGRADE

CVE-2025-21198 is a critical-severity flaw (CVSS 9.0) affecting hpc pack 2016, hpc pack 2019. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

Critical severity
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	9.0 (Critical)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.9% (top 39%)
CISA exploited list	No
Weakness	CWE-306
Published	2025-02-11
Last modified	2026-06-17

Publisher (CNA): Microsoft Corporation · Vendor: microsoft

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-02-11 18:15 UTCPublished CVE record published
2026-06-17 08:42 UTCUpdated Record last modified

microsoft hpc pack 2016 UPGRADE

Affected: < 2016.3

Fixed in: 2016.3

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy hpc-pack-2016 || rpm -q hpc-pack-2016 || hpc-pack-2016 --version

2. UPGRADE to 2016.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade hpc-pack-2016

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade hpc-pack-2016

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

microsoft hpc pack 2019 UPGRADE

Affected: < 6.3.8328.0

Fixed in: 6.3.8328.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy hpc-pack-2019 || rpm -q hpc-pack-2019 || hpc-pack-2019 --version

2. UPGRADE to 6.3.8328.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade hpc-pack-2019

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade hpc-pack-2019

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-21198?

hpc pack 2016: upgrade to 2016.3; hpc pack 2019: upgrade to 6.3.8328.0. Exact commands for each OS are on this page.

Is CVE-2025-21198 being exploited?

CVE-2025-21198 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-21198 affect?

CVE-2025-21198 affects hpc pack 2016, hpc pack 2019. Severity is critical (CVSS 9.0). Microsoft High Performance Compute (HPC) Pack Remote Code Execution Vulnerability

How urgent is CVE-2025-21198?

Priority 52/100. Critical severity; On your watchlist

References

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