{"id":"CVE-2026-85839","kind":"vulnerability","aliases":["CVE-2026-85839"],"related":[],"title":"Microsoft WDAC OLE DB provider for SQL: heap overflow allows remote code execution","description":"Heap-based buffer overflow in Microsoft WDAC OLE DB provider for SQL allows an unauthorized attacker to execute code over a network.","summary":"A heap-based buffer overflow in the Microsoft WDAC OLE DB provider for SQL Server lets an unauthorized attacker run code over the network. The sources give a CVSS score of 8.8 and no details on the affected versions or fix.","severity":"high","cvss":8.8,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["infrastructure","ole-db","sql-server","windows"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T19:21:25+00:00","first_seen_at":"2026-11-10T19:25:18+00:00","triaged_at":"2026-11-10T19:26:03+00:00","updated_at":"2026-11-10T19:26:03+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-11-10T19:26:03Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"Microsoft WDAC OLE DB provider for SQL: heap overflow allows remote code execution","impact":"high","summary":"A heap-based buffer overflow in the Microsoft WDAC OLE DB provider for SQL Server lets an unauthorized attacker run code over the network. The sources give a CVSS score of 8.8 and no details on the affected versions or fix.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["windows","sql-server","ole-db"],"confidence":0.6,"fix_status":"unknown","needs_auth":"no","worst_case":"Attacker runs code on the affected machine over the network","analyst_note":"Find the Microsoft MSRC advisory for CVE-2026-85839 to get affected versions, patches and whether a client-side or server-side setting is needed.","how_to_check":"- unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":[],"who_is_affected":"Systems on Windows that use the Microsoft WDAC OLE DB provider for SQL to connect to databases are likely exposed; the sources do not name the affected versions or configurations. unknown","user_interaction":"unknown","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000676,"input_tokens":4514,"output_tokens":450,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Find the Microsoft MSRC advisory for CVE-2026-85839 to get affected versions, patches and whether a client-side or server-side setting is needed.","search":"'-2026':15A,18A '-85839':16A,19A '8.8':60B 'affect':66B 'allow':10A,83C 'attack':47B,86C 'base':31B,72C 'buffer':32B,73C 'code':12A,49B,89C 'cve':14A,17A 'cvss':57B 'db':4A,23B,39B,79C 'detail':63B 'execut':13A,88C 'fix':69B 'give':55B 'heap':8A,30B,71C 'heap-bas':29B,70C 'infrastructur':20B 'let':44B 'microsoft':1A,36B,76C 'network':52B,92C 'ole':3A,22B,38B,78C 'ole-db':21B 'overflow':9A,33B,74C 'provid':5A,40B,80C 'remot':11A 'run':48B 'score':58B 'server':26B,43B 'sourc':54B 'sql':7A,25B,42B,82C 'sql-server':24B 'unauthor':46B,85C 'version':67B 'wdac':2A,37B,77C 'window':27B","nicknames":[],"mitigations":[],"who_affected":"Systems on Windows that use the Microsoft WDAC OLE DB provider for SQL to connect to databases are likely exposed; the sources do not name the affected versions or configurations. unknown","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["high","infrastructure","oledb","sqlserver","windows"],"campaign_type":null,"search_a":"'-2026':15A,18A '-85839':16A,19A 'allow':10A 'code':12A 'cve':14A,17A 'db':4A 'execut':13A 'heap':8A 'microsoft':1A 'ole':3A 'overflow':9A 'provid':5A 'remot':11A 'sql':7A 'wdac':2A","search_b":"'8.8':60B 'affect':66B 'attack':47B 'base':31B 'buffer':32B 'code':49B 'cvss':57B 'db':23B,39B 'detail':63B 'fix':69B 'give':55B 'heap':30B 'heap-bas':29B 'infrastructur':20B 'let':44B 'microsoft':36B 'network':52B 'ole':22B,38B 'ole-db':21B 'overflow':33B 'provid':40B 'run':48B 'score':58B 'server':26B,43B 'sourc':54B 'sql':25B,42B 'sql-server':24B 'unauthor':46B 'version':67B 'wdac':37B 'window':27B","search_c":"'allow':83C 'attack':86C 'base':72C 'buffer':73C 'code':89C 'db':79C 'execut':88C 'heap':71C 'heap-bas':70C 'microsoft':76C 'network':92C 'ole':78C 'overflow':74C 'provid':80C 'sql':82C 'unauthor':85C 'wdac':77C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:21:25+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-85839","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-85839","severity":null,"published_at":"2026-11-10T19:21:25+00:00","modified_at":"2026-11-10T19:21:25+00:00","first_seen_at":"2026-11-10T19:25:18+00:00","fetched_at":"2026-11-10T19:25:18+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"}