{"id":"CVE-2026-20825","title":"Improper access control in Windows Hyper-V allows an authorized attacker to disclose information locally.","summary":"Improper access control in Windows Hyper-V allows an authorized attacker to disclose information locally.","severity":"medium","cvss":4.4,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N","cwe":["CWE-284"],"vendor":"microsoft","product":"windows_10_1809","affected":["windows_10_1809 < 10.0.17763.8276","windows_10_21h2 < 10.0.19044.6809","windows_10_22h2 < 10.0.19045.6809","windows_11_23h2 < 10.0.22631.6491","windows_11_24h2 < 10.0.26100.7623","windows_11_25h2 < 10.0.26200.7623","windows_server_2019 < 10.0.17763.8276","windows_server_2022 < 10.0.20348.4648","windows_server_2022_23h2 < 10.0.25398.2092","windows_server_2025 < 10.0.26100.32230"],"patched":["windows_10_1809 10.0.17763.8276","windows_10_21h2 10.0.19044.6809","windows_10_22h2 10.0.19045.6809","windows_11_23h2 10.0.22631.6491","windows_11_24h2 10.0.26100.7623","windows_11_25h2 10.0.26200.7623","windows_server_2019 10.0.17763.8276","windows_server_2022 10.0.20348.4648","windows_server_2022_23h2 10.0.25398.2092","windows_server_2025 10.0.26100.32230"],"published":"2026-01-13","updated":"2026-07-30","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-20825","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20825","label":"secure@microsoft.com"}],"tags":["nvd"],"epss":0.0054,"epssPercentile":0.44363,"ingestedAt":"2026-07-31T06:58:51.572Z","slug":"CVE-2026-20825","body":"## Overview\n\nImproper access control in Windows Hyper-V allows an authorized attacker to disclose information locally.\n\n## Affected\n\n- `windows_10_1809 < 10.0.17763.8276`\n- `windows_10_21h2 < 10.0.19044.6809`\n- `windows_10_22h2 < 10.0.19045.6809`\n- `windows_11_23h2 < 10.0.22631.6491`\n- `windows_11_24h2 < 10.0.26100.7623`\n- `windows_11_25h2 < 10.0.26200.7623`\n- `windows_server_2019 < 10.0.17763.8276`\n- `windows_server_2022 < 10.0.20348.4648`\n- `windows_server_2022_23h2 < 10.0.25398.2092`\n- `windows_server_2025 < 10.0.26100.32230`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `windows_10_1809 10.0.17763.8276`\n- `windows_10_21h2 10.0.19044.6809`\n- `windows_10_22h2 10.0.19045.6809`\n- `windows_11_23h2 10.0.22631.6491`\n- `windows_11_24h2 10.0.26100.7623`\n- `windows_11_25h2 10.0.26200.7623`\n- `windows_server_2019 10.0.17763.8276`\n- `windows_server_2022 10.0.20348.4648`\n- `windows_server_2022_23h2 10.0.25398.2092`\n- `windows_server_2025 10.0.26100.32230`","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":24.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}