How severe is CVE-2025-21198?

CVE-2025-21198 has a CVSS 3.x base score of 9.0, rated critical severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-21198 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-21198?

CVE-2025-21198 primarily affects Microsoft Hpc Pack 2016. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-21198?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2025-21198 have an EU (EUVD) identifier?

Yes. CVE-2025-21198 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-2272.

When was CVE-2025-21198 published?

CVE-2025-21198 was published on 2025-02-11 and last updated on 2026-06-17.

CVE-2025-21198

CVE-2025-21198 is a critical-severity vulnerability in Microsoft Hpc Pack 2016 with a CVSS 3.x base score of 9.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-306.

Key facts

Severity: Critical (CVSS 3.x base score 9.0)
EPSS exploit prediction: 1% (55th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-2272
Weakness: CWE-306
Affected product: Microsoft Hpc Pack 2016
Published: 2025-02-11
Last modified: 2026-06-17

Description

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

Frequently asked questions

What is CVE-2025-21198?: Microsoft High Performance Compute (HPC) Pack Remote Code Execution Vulnerability
How severe is CVE-2025-21198?: CVE-2025-21198 has a CVSS 3.x base score of 9.0, rated critical severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-21198 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-21198?: CVE-2025-21198 primarily affects Microsoft Hpc Pack 2016. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-21198?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-21198 have an EU (EUVD) identifier?: Yes. CVE-2025-21198 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-2272.
When was CVE-2025-21198 published?: CVE-2025-21198 was published on 2025-02-11 and last updated on 2026-06-17.

References

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

Affected products (2)

cpe:2.3:a:microsoft:hpc_pack_2016:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:hpc_pack_2019:*:*:*:*:*:*:*:*

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