{"id":"CVE-2026-85838","kind":"vulnerability","aliases":["CVE-2026-85838"],"related":[],"title":"Microsoft WDAC OLE DB provider for SQL: heap overflow lets attacker run code","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 trigger memory corruption over the network. The sources say this allows code execution.","severity":"high","cvss":8.8,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["ole-db","sql-server","vendor","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":"vendor","confidence":0.5,"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 lets attacker run code","impact":"high","summary":"A heap-based buffer overflow in the Microsoft WDAC OLE DB provider for SQL Server lets an unauthorized attacker trigger memory corruption over the network. The sources say this allows code execution.","audience":"businesses","category":"vendor","nicknames":[],"who_cares":["windows","sql-server","ole-db"],"confidence":0.5,"fix_status":"unknown","needs_auth":"unknown","worst_case":"Attacker runs code over the network without credentials","analyst_note":"Find the Microsoft security update guide entry for CVE-2026-85838 to get affected builds, fixed versions, and whether authentication or special configuration is required.","how_to_check":"unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":[],"who_is_affected":"unknown","user_interaction":"unknown","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000639,"input_tokens":4514,"output_tokens":376,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Find the Microsoft security update guide entry for CVE-2026-85838 to get affected builds, fixed versions, and whether authentication or special configuration is required.","search":"'-2026':15A,18A '-85838':16A,19A 'allow':58B,74C 'attack':11A,47B,77C 'base':31B,63C 'buffer':32B,64C 'code':13A,59B,80C 'corrupt':50B 'cve':14A,17A 'db':4A,22B,39B,70C 'execut':60B,79C 'heap':8A,30B,62C 'heap-bas':29B,61C 'let':10A,44B 'memori':49B 'microsoft':1A,36B,67C 'network':53B,83C 'ole':3A,21B,38B,69C 'ole-db':20B 'overflow':9A,33B,65C 'provid':5A,40B,71C 'run':12A 'say':56B 'server':25B,43B 'sourc':55B 'sql':7A,24B,42B,73C 'sql-server':23B 'trigger':48B 'unauthor':46B,76C 'vendor':26B 'wdac':2A,37B,68C 'window':27B","nicknames":[],"mitigations":[],"who_affected":null,"tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["high","oledb","sqlserver","vendor","windows"],"campaign_type":null,"search_a":"'-2026':15A,18A '-85838':16A,19A 'attack':11A 'code':13A 'cve':14A,17A 'db':4A 'heap':8A 'let':10A 'microsoft':1A 'ole':3A 'overflow':9A 'provid':5A 'run':12A 'sql':7A 'wdac':2A","search_b":"'allow':58B 'attack':47B 'base':31B 'buffer':32B 'code':59B 'corrupt':50B 'db':22B,39B 'execut':60B 'heap':30B 'heap-bas':29B 'let':44B 'memori':49B 'microsoft':36B 'network':53B 'ole':21B,38B 'ole-db':20B 'overflow':33B 'provid':40B 'say':56B 'server':25B,43B 'sourc':55B 'sql':24B,42B 'sql-server':23B 'trigger':48B 'unauthor':46B 'vendor':26B 'wdac':37B 'window':27B","search_c":"'allow':74C 'attack':77C 'base':63C 'buffer':64C 'code':80C 'db':70C 'execut':79C 'heap':62C 'heap-bas':61C 'microsoft':67C 'network':83C 'ole':69C 'overflow':65C 'provid':71C 'sql':73C 'unauthor':76C 'wdac':68C","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-2026-85838","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-85838","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"}