{"id":"CVE-2026-119906","kind":"vulnerability","aliases":["CVE-2026-119906"],"related":[],"title":"Windows Sandbox: OS command injection lets a local user gain higher privileges","description":"Improper neutralization of special elements used in an os command ('os command injection') in Windows Sandbox allows an authorized attacker to elevate privileges locally.","summary":"Windows Sandbox mishandles special characters in OS commands, so an authorized local attacker can inject commands. The result is elevated privileges on the machine.","severity":"high","cvss":7.8,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"Windows Sandbox","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["infrastructure","windows","windows-sandbox"],"not_affected_if":["windows-sandbox-not-installed"],"how_to_check":"- Check the Windows build with `winver` and compare it to the Microsoft security update that lists CVE-2026-119906.\n- Check whether Windows Sandbox is installed: the optional feature 'Windows Sandbox' in Turn Windows features on or off.","fix":null,"status":"open","published_at":"2026-11-10T19:20:11+00:00","first_seen_at":"2026-11-10T19:25:02+00:00","triaged_at":"2026-11-10T19:40:18+00:00","updated_at":"2026-11-10T19:40:18+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-11-10T19:40:18Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Windows Sandbox: OS command injection lets a local user gain higher privileges","impact":"high","summary":"Windows Sandbox mishandles special characters in OS commands, so an authorized local attacker can inject commands. The result is elevated privileges on the machine.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["windows","windows-sandbox"],"confidence":0.5,"fix_status":"unknown","needs_auth":"yes","worst_case":"local attacker gains elevated privileges on the Windows host","analyst_note":"Find the Microsoft advisory for CVE-2026-119906 to confirm affected builds and the fixed update.","how_to_check":"- Check the Windows build with `winver` and compare it to the Microsoft security update that lists CVE-2026-119906.\n- Check whether Windows Sandbox is installed: the optional feature 'Windows Sandbox' in Turn Windows features on or off.","plain_action":"","product_name":"Windows Sandbox","needs_analyst":true,"not_affected_if":["windows-sandbox-not-installed"],"who_is_affected":"Affects Windows machines where Windows Sandbox is available, and it requires a local account that is already authorized on the machine. Machines without the Windows Sandbox feature enabled are likely not exposed. The sources do not state affected builds or a fixed version.","user_interaction":"no","product_ecosystem":"vendor","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000719,"input_tokens":4501,"output_tokens":537,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Find the Microsoft advisory for CVE-2026-119906 to confirm affected builds and the fixed update.","search":"'-119906':15A,18A '-2026':14A,17A 'allow':66C 'attack':38B,69C 'author':36B,68C 'charact':30B 'command':4A,33B,41B,59C,61C 'cve':13A,16A 'element':54C 'elev':45B,71C 'gain':10A 'higher':11A 'improp':50C 'infrastructur':21B 'inject':5A,40B,62C 'let':6A 'local':8A,37B,73C 'machin':49B 'mishandl':28B 'neutral':51C 'os':3A,32B,58C,60C 'privileg':12A,46B,72C 'result':43B 'sandbox':2A,20A,25B,27B,65C 'special':29B,53C 'use':55C 'user':9A 'window':1A,22B,24B,26B,64C 'windows':19A 'windows-sandbox':23B","nicknames":[],"mitigations":[],"who_affected":"Affects Windows machines where Windows Sandbox is available, and it requires a local account that is already authorized on the machine. Machines without the Windows Sandbox feature enabled are likely not exposed. The sources do not state affected builds or a fixed version.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":["sandbox","windowssandbox"],"ptokens":["sandbox","windows"],"labels":["high","infrastructure","vendor","windows","windowssandbox"],"campaign_type":null,"search_a":"'-119906':15A,18A '-2026':14A,17A 'command':4A 'cve':13A,16A 'gain':10A 'higher':11A 'inject':5A 'let':6A 'local':8A 'os':3A 'privileg':12A 'sandbox':2A,20A 'user':9A 'window':1A 'windows':19A","search_b":"'attack':38B 'author':36B 'charact':30B 'command':33B,41B 'elev':45B 'infrastructur':21B 'inject':40B 'local':37B 'machin':49B 'mishandl':28B 'os':32B 'privileg':46B 'result':43B 'sandbox':25B,27B 'special':29B 'window':22B,24B,26B 'windows-sandbox':23B","search_c":"'allow':66C 'attack':69C 'author':68C 'command':59C,61C 'element':54C 'elev':71C 'improp':50C 'inject':62C 'local':73C 'neutral':51C 'os':58C,60C 'privileg':72C 'sandbox':65C 'special':53C 'use':55C 'window':64C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:20:11+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:L/AC:L/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-2026-119906","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-119906","severity":null,"published_at":"2026-11-10T19:20:11+00:00","modified_at":"2026-11-10T19:20:11+00:00","first_seen_at":"2026-11-10T19:25:02+00:00","fetched_at":"2026-11-10T19:25:02+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"}