--- title: "CVE-2025-21333: Windows Hyper-V NT Kernel Integration VSP… | CubePath" description: "Windows Hyper-V NT Kernel Integration VSP Elevation of Privilege Vulnerability" language: en source: https://cubepath.com/security/cve/CVE-2025-21333 --- # CVE-2025-21333: Windows Hyper-V NT Kernel Integration VSP… | CubePath ## Description Windows Hyper-V NT Kernel Integration VSP Elevation of Privilege Vulnerability Official description from the CVE record, published by microsoft. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2025-21333) ## Key data ### CVSS 3.1 High 7.8 Score published by microsoft in the CVE record. CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C | Metric | Value | What it means | | ---------------------- | --------- | ----------------------------------------------------------------------------------------- | | Attack vector | Local | The attacker needs local access to the system, or to trick a user into running something. | | Attack complexity | Low | No special conditions are needed. The attack can be repeated at will. | | Privileges required | Low | A basic user account is needed. | | User interaction | None | No action from any user is needed. | | Scope | Unchanged | The impact stays within the vulnerable component. | | Confidentiality impact | High | Serious or total effect on the secrecy of data. | | Integrity impact | High | Serious or total effect on the trustworthiness of data. | | Availability impact | High | Serious or total effect on availability. | CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at [first.org/cvss](https://www.first.org/cvss/) . ### EPSS Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days. Score 0.10066 (10.1% probability) Percentile 95.7% Scores of Nov 10, 2026 Model v2026.06.15 ### CISA Known Exploited Vulnerabilities This CVE is listed in the CISA KEV catalog. Name in the catalog Microsoft Windows Hyper-V NT Kernel Integration VSP Heap-based Buffer Overflow Vulnerability Added to the catalog Jan 14, 2025 Federal due date Feb 4, 2025 ### CISA assessment as of Jan 23, 2025 Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA. Exploitation Recorded by CISA as active Automatable no Technical impact total ### Weakness (CWE) CWE catalog version 5.0. CWE names: Copyright © 2006-2026, The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CWE license. - [CWE-122](https://cwe.mitre.org/data/definitions/122.html) Heap-based Buffer Overflow ## Affected products Products listed in the CVE record, as the CNA published them. - Microsoft Windows 10 Version 21H2 - affected: 10.0.19044.0 up to before 10.0.19044.5371 - Microsoft Windows 10 Version 22H2 - affected: 10.0.19045.0 up to before 10.0.19045.5371 - Microsoft Windows 11 version 22H2 - affected: 10.0.22621.0 up to before 10.0.22621.4751 - Microsoft Windows 11 version 22H3 - affected: 10.0.22631.0 up to before 10.0.22631.4751 - Microsoft Windows 11 Version 23H2 - affected: 10.0.22631.0 up to before 10.0.22631.4751 - Microsoft Windows 11 Version 24H2 - affected: 10.0.26100.0 up to before 10.0.26100.2894 - Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) - affected: 10.0.25398.0 up to before 10.0.25398.1369 - Microsoft Windows Server 2025 - affected: 10.0.26100.0 up to before 10.0.26100.2894 - Microsoft Windows Server 2025 (Server Core installation) - affected: 10.0.26100.0 up to before 10.0.26100.2894 ## References Links listed in the CVE record. They lead to other sites, which CubePath does not control. - [Windows Hyper-V NT Kernel Integration VSP Elevation of Privilege Vulnerability](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21333) (msrc.microsoft.com) vendor-advisory patch - [vicarius.io/vsociety/posts/cve-2025-21333-elevated-privileg…](https://www.vicarius.io/vsociety/posts/cve-2025-21333-elevated-privilege-exposure-in-windows-hyper-v-by-microsoft-mitigation-script) - [vicarius.io/vsociety/posts/cve-2025-21333-elevated-privileg…](https://www.vicarius.io/vsociety/posts/cve-2025-21333-elevated-privilege-exposure-in-windows-hyper-v-by-microsoft-detection-script) - [exploit-db.com/exploits/52436](https://www.exploit-db.com/exploits/52436) ## Timeline 1. ID reserved Dec 11, 2024 2. Added to CISA KEV Jan 14, 2025 3. Record published Jan 14, 2025 4. Record last updated Jun 9, 2026 ## Look up another CVE ## About CubePath CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection. [Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection) Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 20:03 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)