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CVE-2025-21198

26
FAUCET Score

CVE-2025-21198 is a critical Remote Code Execution vulnerability affecting Microsoft HPC Pack 2016 and 2019. This flaw allows an authenticated attacker on the adjacent network to execute arbitrary code with high privileges, leading to complete compromise of confidentiality, integrity, and availability. While not currently listed in CISA's KEV catalog and lacking public exploit code, it has garnered significant community discussion and media coverage, indicating a high level of awareness and potential for future exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
< 2016.3CPE matchmatch criteria
cpe:2.3:a:microsoft:hpc_pack_2016:*:*:*:*:*:*:*:*
< 6.3.8328.0CPE matchmatch criteria
cpe:2.3:a:microsoft:hpc_pack_2019:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.0CRITICAL

CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.3
Impact Score
6.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.92%
Probability of exploitation in next 30 days
EPSS Percentile
56.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0092 is in the 51st percentile among its peer group of 42 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.3 Reddit, 0.3 Bluesky, 0.4 Mastodon, and 2.6 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.9 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: Microsoft HPC Pack 2019Fixed in: 6.3.8328.0
View patch
microsoftpatch availablevia msrc
Product: Microsoft HPC Pack 2016Fixed in: 2016.3
View patch

Vendor Advisories (1)

microsoft2025-Feb/CVE-2025-21198Important

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

Feb 11, 2025

References

msrc.microsoft.com / update-guide/vulnerability/CVE-2025-21198
PatchVendor Advisory