{"id":"CVE-2026-67637","kind":"vulnerability","aliases":["CVE-2026-67637"],"related":[],"title":"Microsoft SQL Server: heap overflow lets an authorized user run code remotely","description":"Heap-based buffer overflow in SQL Server allows an authorized attacker to execute code over a network.","summary":"A heap-based buffer overflow in Microsoft SQL Server lets a user who already has authorized access run code over the network. The sources do not name the affected versions or the fix.","severity":"high","cvss":8.8,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["microsoft","other","sql-server","windows"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T19:21:19+00:00","first_seen_at":"2026-11-10T19:25:16+00:00","triaged_at":"2026-11-10T19:26:06+00:00","updated_at":"2026-11-10T19:26:06+00:00","category":"other","confidence":0.5,"triage":{"at":"2026-11-10T19:26:06Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"Microsoft SQL Server: heap overflow lets an authorized user run code remotely","impact":"high","summary":"A heap-based buffer overflow in Microsoft SQL Server lets a user who already has authorized access run code over the network. The sources do not name the affected versions or the fix.","audience":"businesses","category":"other","nicknames":[],"who_cares":["sql-server","microsoft","windows"],"confidence":0.5,"fix_status":"unknown","needs_auth":"yes","worst_case":"Attacker runs code on the database server over the network","analyst_note":"Check the Microsoft Security Update Guide entry for CVE-2026-67637 for affected SQL Server versions, the fixed builds and any non-default configuration needed.","how_to_check":"- unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":[],"who_is_affected":"Organizations that run Microsoft SQL Server and let users connect over the network. The sources do not say which versions or configurations are affected, so the exposure is unknown.","user_interaction":"no","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000651,"input_tokens":4482,"output_tokens":406,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Check the Microsoft Security Update Guide entry for CVE-2026-67637 for affected SQL Server versions, the fixed builds and any non-default configuration needed.","search":"'-2026':14A,17A '-67637':15A,18A 'access':42B 'affect':54B 'allow':67C 'alreadi':39B 'attack':70C 'author':8A,41B,69C 'base':28B,61C 'buffer':29B,62C 'code':11A,44B,73C 'cve':13A,16A 'execut':72C 'fix':58B 'heap':4A,27B,60C 'heap-bas':26B,59C 'let':6A,35B 'microsoft':1A,19B,32B 'name':52B 'network':47B,76C 'overflow':5A,30B,63C 'remot':12A 'run':10A,43B 'server':3A,23B,34B,66C 'sourc':49B 'sql':2A,22B,33B,65C 'sql-server':21B 'user':9A,37B 'version':55B 'window':24B","nicknames":[],"mitigations":[],"who_affected":"Organizations that run Microsoft SQL Server and let users connect over the network. The sources do not say which versions or configurations are affected, so the exposure is unknown.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["high","microsoft","other","sqlserver","windows"],"campaign_type":null,"search_a":"'-2026':14A,17A '-67637':15A,18A 'author':8A 'code':11A 'cve':13A,16A 'heap':4A 'let':6A 'microsoft':1A 'overflow':5A 'remot':12A 'run':10A 'server':3A 'sql':2A 'user':9A","search_b":"'access':42B 'affect':54B 'alreadi':39B 'author':41B 'base':28B 'buffer':29B 'code':44B 'fix':58B 'heap':27B 'heap-bas':26B 'let':35B 'microsoft':19B,32B 'name':52B 'network':47B 'overflow':30B 'run':43B 'server':23B,34B 'sourc':49B 'sql':22B,33B 'sql-server':21B 'user':37B 'version':55B 'window':24B","search_c":"'allow':67C 'attack':70C 'author':69C 'base':61C 'buffer':62C 'code':73C 'execut':72C 'heap':60C 'heap-bas':59C 'network':76C 'overflow':63C 'server':66C 'sql':65C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:21:19+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/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-2026-67637","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-67637","severity":null,"published_at":"2026-11-10T19:21:19+00:00","modified_at":"2026-11-10T19:21:19+00:00","first_seen_at":"2026-11-10T19:25:16+00:00","fetched_at":"2026-11-10T19:25:16+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"}