{"id":"CVE-2025-21335","title":"Windows Hyper-V NT Kernel Integration VSP Elevation of Privilege Vulnerability","summary":"Windows Hyper-V NT Kernel Integration VSP Elevation of Privilege Vulnerability","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-416"],"vendor":"microsoft","product":"windows_10_21h2","affected":["windows_10_21h2 < 10.0.19044.5371","windows_10_22h2 < 10.0.19045.5371","windows_11_22h2 < 10.0.22621.4751","windows_11_23h2 < 10.0.22631.4751","windows_11_24h2 < 10.0.26100.2894","windows_server_2022_23h2 < 10.0.25398.1369","windows_server_2025 < 10.0.26100.2894"],"patched":["windows_10_21h2 10.0.19044.5371","windows_10_22h2 10.0.19045.5371","windows_11_22h2 10.0.22621.4751","windows_11_23h2 10.0.22631.4751","windows_11_24h2 10.0.26100.2894","windows_server_2022_23h2 10.0.25398.1369","windows_server_2025 10.0.26100.2894"],"published":"2025-01-14","updated":"2026-09-24","sourceUpdated":"2026-09-24T13:10:00.320","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-21335","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21335","label":"secure@microsoft.com"},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-21335","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","kev","in-the-wild"],"epss":0.0139,"epssPercentile":0.71151,"kev":true,"kevDateAdded":"2025-01-14","kevDueDate":"2025-02-04","kevRansomware":false,"exploited":true,"zeroDay":true,"ingestedAt":"2026-09-24T13:43:25.651Z","slug":"CVE-2025-21335","body":"## Overview\n\nWindows Hyper-V NT Kernel Integration VSP Elevation of Privilege Vulnerability\n\n## Affected\n\n- `windows_10_21h2 < 10.0.19044.5371`\n- `windows_10_22h2 < 10.0.19045.5371`\n- `windows_11_22h2 < 10.0.22621.4751`\n- `windows_11_23h2 < 10.0.22631.4751`\n- `windows_11_24h2 < 10.0.26100.2894`\n- `windows_server_2022_23h2 < 10.0.25398.1369`\n- `windows_server_2025 < 10.0.26100.2894`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `windows_10_21h2 10.0.19044.5371`\n- `windows_10_22h2 10.0.19045.5371`\n- `windows_11_22h2 10.0.22621.4751`\n- `windows_11_23h2 10.0.22631.4751`\n- `windows_11_24h2 10.0.26100.2894`\n- `windows_server_2022_23h2 10.0.25398.1369`\n- `windows_server_2025 10.0.26100.2894`","depth":"abyssal","depthScore":68,"depthScoreParts":{"impact":42.9,"likelihood":0.3,"exploitation":25,"ransomware":0},"changes":[]}