{"id":"CVE-2026-119992","kind":"vulnerability","aliases":["CVE-2026-119992"],"related":[],"title":"Windows HTTP.sys: double free lets a local user gain higher privileges","description":"Double free in Windows HTTP.sys allows an authorized attacker to elevate privileges locally.","summary":"A double free bug in the Windows HTTP.sys driver lets a user who already has access to the machine raise their privileges. An attacker who gets a foothold on a Windows host can use it to take control of the system.","severity":"high","cvss":7.0,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["http-sys","infrastructure","windows"],"not_affected_if":[],"how_to_check":"- Check the Windows build with `winver` and compare it against the update Microsoft lists for CVE-2026-119992\n- Review Windows Update history for the monthly security update that covers HTTP.sys","fix":null,"status":"open","published_at":"2026-11-10T19:20:24+00:00","first_seen_at":"2026-11-10T19:25:06+00:00","triaged_at":"2026-11-10T19:51:22+00:00","updated_at":"2026-11-10T19:51:22+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-11-10T19:51:22Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Windows HTTP.sys: double free lets a local user gain higher privileges","impact":"high","summary":"A double free bug in the Windows HTTP.sys driver lets a user who already has access to the machine raise their privileges. An attacker who gets a foothold on a Windows host can use it to take control of the system.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["windows","http-sys"],"confidence":0.5,"fix_status":"unknown","needs_auth":"yes","worst_case":"local user gains elevated system privileges on the Windows host","analyst_note":"Find Microsoft's advisory for CVE-2026-119992 to confirm affected Windows builds and the patch.","how_to_check":"- Check the Windows build with `winver` and compare it against the update Microsoft lists for CVE-2026-119992\n- Review Windows Update history for the monthly security update that covers HTTP.sys\n- unknown for anything beyond that, as the sources do not say","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":[],"who_is_affected":"unknown","user_interaction":"no","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000663,"input_tokens":4480,"output_tokens":430,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Find Microsoft's advisory for CVE-2026-119992 to confirm affected Windows builds and the patch.","search":"'-119992':14A,17A '-2026':13A,16A 'access':38B 'allow':69C 'alreadi':36B 'attack':46B,72C 'author':71C 'bug':26B 'control':60B 'cve':12A,15A 'doubl':3A,24B,64C 'driver':31B 'elev':74C 'foothold':50B 'free':4A,25B,65C 'gain':9A 'get':48B 'higher':10A 'host':54B 'http':19B 'http-sys':18B 'http.sys':2A,30B,68C 'infrastructur':21B 'let':5A,32B 'local':7A,76C 'machin':41B 'privileg':11A,44B,75C 'rais':42B 'sys':20B 'system':63B 'take':59B 'use':56B 'user':8A,34B 'window':1A,22B,29B,53B,67C","nicknames":[],"mitigations":[],"who_affected":null,"tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["high","httpsys","infrastructure","windows"],"campaign_type":null,"search_a":"'-119992':14A,17A '-2026':13A,16A 'cve':12A,15A 'doubl':3A 'free':4A 'gain':9A 'higher':10A 'http.sys':2A 'let':5A 'local':7A 'privileg':11A 'user':8A 'window':1A","search_b":"'access':38B 'alreadi':36B 'attack':46B 'bug':26B 'control':60B 'doubl':24B 'driver':31B 'foothold':50B 'free':25B 'get':48B 'host':54B 'http':19B 'http-sys':18B 'http.sys':30B 'infrastructur':21B 'let':32B 'machin':41B 'privileg':44B 'rais':42B 'sys':20B 'system':63B 'take':59B 'use':56B 'user':34B 'window':22B,29B,53B","search_c":"'allow':69C 'attack':72C 'author':71C 'doubl':64C 'elev':74C 'free':65C 'http.sys':68C 'local':76C 'privileg':75C 'window':67C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:20:24+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-119992","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-119992","severity":null,"published_at":"2026-11-10T19:20:24+00:00","modified_at":"2026-11-10T19:20:24+00:00","first_seen_at":"2026-11-10T19:25:06+00:00","fetched_at":"2026-11-10T19:25:06+00:00","note":null}],"documents":[],"disclosures":[],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}