{"id":"CVE-2025-49751","aliases":["EUVD-2025-24379","GHSA-ppcc-7hrx-r7pf"],"status":"published","title":"Windows Hyper-V Denial of Service Vulnerability","description":"Missing synchronization in Windows Hyper-V allows an authorized attacker to deny service over an adjacent network.","severity":{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-08","score":0.00535,"percentile":0.45426,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-820"],"published":"2025-08-12T17:09:41Z","modified":"2026-06-17T09:31:53Z","products":[{"vendor":"microsoft","product":"windows 10 version 1607"},{"vendor":"microsoft","product":"windows 10 version 1809"},{"vendor":"microsoft","product":"windows 10 version 21h2"},{"vendor":"microsoft","product":"windows 10 version 22h2"},{"vendor":"microsoft","product":"windows 11 version 22h2"},{"vendor":"microsoft","product":"windows 11 version 22h3"},{"vendor":"microsoft","product":"windows 11 version 23h2"},{"vendor":"microsoft","product":"windows 11 version 24h2"},{"vendor":"microsoft","product":"windows server 2016"},{"vendor":"microsoft","product":"windows server 2016 (server core installation)"},{"vendor":"microsoft","product":"windows server 2019"},{"vendor":"microsoft","product":"windows server 2019 (server core installation)"},{"vendor":"microsoft","product":"windows server 2022"},{"vendor":"microsoft","product":"windows server 2022, 23h2 edition (server core installation)"},{"vendor":"microsoft","product":"windows server 2025"},{"vendor":"microsoft","product":"windows server 2025 (server core installation)"},{"vendor":"microsoft","product":"windows_10_1607"},{"vendor":"microsoft","product":"windows_10_1809"},{"vendor":"microsoft","product":"windows_10_21h2"},{"vendor":"microsoft","product":"windows_10_22h2"},{"vendor":"microsoft","product":"windows_11_22h2"},{"vendor":"microsoft","product":"windows_11_23h2"},{"vendor":"microsoft","product":"windows_11_24h2"},{"vendor":"microsoft","product":"windows_server_2016"},{"vendor":"microsoft","product":"windows_server_2019"},{"vendor":"microsoft","product":"windows_server_2022"},{"vendor":"microsoft","product":"windows_server_2022_23h2"},{"vendor":"microsoft","product":"windows_server_2025"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49751","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-49751"},{"url":"https://github.com/advisories/GHSA-ppcc-7hrx-r7pf"}],"sources":{"cve":[{"id":"CVE-2025-49751","title":"Windows Hyper-V Denial of Service Vulnerability","description":"Missing synchronization in Windows Hyper-V allows an authorized attacker to deny service over an adjacent network.","status":"published","published":"2025-08-12T17:09:41.01Z","modified":"2026-02-13T18:53:56.444Z","cvss":[{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C","level":"medium","assessor":"cna"}],"cwes":["CWE-820"],"updated_at":"2026-11-02T14:32:25.186422Z"}],"euvd":[{"id":"EUVD-2025-24379","description":"Missing synchronization in Windows Hyper-V allows an authorized attacker to deny service over an adjacent network.","status":"published","published":"2025-08-12T17:09:41Z","modified":"2026-02-13T18:53:56Z","cvss":[{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C","level":"medium"}],"updated_at":"2026-11-02T19:48:39.919829Z"}],"ghsa":[{"id":"GHSA-ppcc-7hrx-r7pf","title":"Missing synchronization in Windows Hyper-V allows an authorized attacker to deny service over an...","description":"Missing synchronization in Windows Hyper-V allows an authorized attacker to deny service over an adjacent network.","status":"published","published":"2025-08-12T18:31:30Z","modified":"2025-08-12T18:31:38Z","cvss":[{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-820"],"updated_at":"2026-11-02T15:03:15.553141Z"}],"nvd":[{"id":"CVE-2025-49751","description":"Missing synchronization in Windows Hyper-V allows an authorized attacker to deny service over an adjacent network.","status":"published","published":"2025-08-12T18:15:30.83Z","modified":"2026-06-17T09:31:53.657Z","cvss":[{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-820"],"updated_at":"2026-11-02T14:11:22.953396Z"}]}}