{"id":"CVE-2026-118739","aliases":["EUVD-2026-122249","GHSA-m9r7-7c4w-3w43"],"status":"published","title":"Windows DHCP Client Denial of Service Vulnerability","description":"Missing release of memory after effective lifetime in Windows DHCP Client allows an unauthorized attacker to deny service over an adjacent network.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-14","score":0.00675,"percentile":0.5278,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-401"],"published":"2026-11-10T18:21:50Z","modified":"2026-11-10T21:33:18Z","products":[{"vendor":"microsoft","product":"windows 11 version 24h2"},{"vendor":"microsoft","product":"windows 11 version 25h2"},{"vendor":"microsoft","product":"windows 11 version 26h1"},{"vendor":"microsoft","product":"windows server 2025"},{"vendor":"microsoft","product":"windows server 2025 (server core installation)"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-118739","tags":["vendor-advisory","patch"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118739"},{"url":"https://github.com/advisories/GHSA-m9r7-7c4w-3w43"}],"sources":{"cve":[{"id":"CVE-2026-118739","title":"Windows DHCP Client Denial of Service Vulnerability","description":"Missing release of memory after effective lifetime in Windows DHCP Client allows an unauthorized attacker to deny service over an adjacent network.","status":"published","published":"2026-11-10T18:21:50.233Z","modified":"2026-11-13T18:10:33.424Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C","level":"medium","assessor":"cna"}],"cwes":["CWE-401"],"updated_at":"2026-11-10T19:39:58.44836Z"}],"euvd":[{"id":"EUVD-2026-122249","description":"Missing release of memory after effective lifetime in Windows DHCP Client allows an unauthorized attacker to deny service over an adjacent network.","status":"published","published":"2026-11-10T18:21:50Z","modified":"2026-11-13T18:10:33Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C","level":"medium"}],"updated_at":"2026-11-10T23:24:34.630267Z"}],"ghsa":[{"id":"GHSA-m9r7-7c4w-3w43","title":"Missing release of memory after effective lifetime in Windows DHCP Client allows an unauthorized...","description":"Missing release of memory after effective lifetime in Windows DHCP Client allows an unauthorized attacker to deny service over an adjacent network.","status":"published","published":"2026-11-10T21:33:09Z","modified":"2026-11-10T21:33:18Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-401"],"updated_at":"2026-11-10T21:57:52.876435Z"}],"nvd":[{"id":"CVE-2026-118739","description":"Missing release of memory after effective lifetime in Windows DHCP Client allows an unauthorized attacker to deny service over an adjacent network.","status":"published","published":"2026-11-10T19:19:50.577Z","modified":"2026-11-10T20:18:25.173Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-401"],"updated_at":"2026-11-10T22:21:32.984056Z"}]}}