{"id":"CVE-2026-112789","kind":"vulnerability","aliases":["CVE-2026-112789"],"related":[],"title":"Windows Installer: race condition lets a local user read information","description":"Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Installer allows an authorized attacker to disclose information locally.","summary":"Windows Installer has a race condition where concurrent execution uses a shared resource without proper synchronization. An authorized local attacker can disclose information from the affected machine.","severity":"medium","cvss":4.7,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["infrastructure","windows","windows-installer"],"not_affected_if":["no-local-users"],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T19:18:40+00:00","first_seen_at":"2026-11-10T19:24:32+00:00","triaged_at":"2026-11-10T20:04:18+00:00","updated_at":"2026-11-10T20:04:18+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-11-10T20:04:18Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Windows Installer: race condition lets a local user read information","impact":"low","summary":"Windows Installer has a race condition where concurrent execution uses a shared resource without proper synchronization. An authorized local attacker can disclose information from the affected machine.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["windows","windows-installer"],"confidence":0.5,"fix_status":"unknown","needs_auth":"yes","worst_case":"local attacker reads information it should not see","analyst_note":"Sources give only the NVD description; check Microsoft's security update guide for affected builds and fixes.","how_to_check":"- unknown","plain_action":"","product_name":"","needs_analyst":false,"not_affected_if":["no-local-users"],"who_is_affected":"Only machines where a local account can run the affected Windows Installer component. The sources do not name affected Windows builds or the exact code path.","user_interaction":"unknown","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000632,"input_tokens":4498,"output_tokens":365,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-112789':13A,16A '-2026':12A,15A 'affect':47B 'allow':62C 'attack':41B,65C 'author':39B,64C 'concurr':29B,49C 'condit':4A,27B,58C 'cve':11A,14A 'disclos':43B,67C 'execut':30B,50C 'improp':55C 'inform':10A,44B,68C 'infrastructur':17B 'instal':2A,21B,23B,61C 'let':5A 'local':7A,40B,69C 'machin':48B 'proper':36B 'race':3A,26B,57C 'read':9A 'resourc':34B,53C 'share':33B,52C 'synchron':37B,56C 'use':31B,51C 'user':8A 'window':1A,18B,20B,22B,60C 'windows-instal':19B 'without':35B","nicknames":[],"mitigations":[],"who_affected":"Only machines where a local account can run the affected Windows Installer component. The sources do not name affected Windows builds or the exact code path.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["infrastructure","medium","windows","windowsinstaller"],"campaign_type":null,"search_a":"'-112789':13A,16A '-2026':12A,15A 'condit':4A 'cve':11A,14A 'inform':10A 'instal':2A 'let':5A 'local':7A 'race':3A 'read':9A 'user':8A 'window':1A","search_b":"'affect':47B 'attack':41B 'author':39B 'concurr':29B 'condit':27B 'disclos':43B 'execut':30B 'inform':44B 'infrastructur':17B 'instal':21B,23B 'local':40B 'machin':48B 'proper':36B 'race':26B 'resourc':34B 'share':33B 'synchron':37B 'use':31B 'window':18B,20B,22B 'windows-instal':19B 'without':35B","search_c":"'allow':62C 'attack':65C 'author':64C 'concurr':49C 'condit':58C 'disclos':67C 'execut':50C 'improp':55C 'inform':68C 'instal':61C 'local':69C 'race':57C 'resourc':53C 'share':52C 'synchron':56C 'use':51C 'window':60C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:18:40+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-112789","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-112789","severity":null,"published_at":"2026-11-10T19:18:40+00:00","modified_at":"2026-11-10T19:18:40+00:00","first_seen_at":"2026-11-10T19:24:32+00:00","fetched_at":"2026-11-10T19:24:32+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"}