{"id":"CVE-2026-109475","kind":"vulnerability","aliases":["CVE-2026-109475"],"related":[],"title":".NET: stack buffer overflow lets a network attacker crash services","description":"Stack-based buffer overflow in .NET allows an unauthorized attacker to deny service over a network.","summary":"A stack-based buffer overflow in .NET lets an unauthenticated attacker over the network cause a denial of service. The sources do not say which .NET component or version range is affected.","severity":"high","cvss":7.5,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":".NET","fixed":[],"affected":"","ecosystem":"runtime"}],"ecosystems":["runtime"],"tags":["dotnet","network-facing","runtime"],"not_affected_if":[],"how_to_check":"- Run `dotnet --version` to see which .NET SDK or runtime is installed","fix":null,"status":"open","published_at":"2026-11-10T19:18:16+00:00","first_seen_at":"2026-11-10T19:24:24+00:00","triaged_at":"2026-11-10T19:47:25+00:00","updated_at":"2026-11-10T19:47:25+00:00","category":"runtime","confidence":0.4,"triage":{"at":"2026-11-10T19:47:25Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":".NET: stack buffer overflow lets a network attacker crash services","impact":"low","summary":"A stack-based buffer overflow in .NET lets an unauthenticated attacker over the network cause a denial of service. The sources do not say which .NET component or version range is affected.","audience":"businesses","category":"runtime","nicknames":[],"who_cares":["dotnet","network-facing"],"confidence":0.4,"fix_status":"unknown","needs_auth":"no","worst_case":"Service crashes or stops responding to network requests","analyst_note":"Find the affected .NET versions and the fixed release in the NVD entry at https://nvd.nist.gov/vuln/detail/CVE-2026-109475 or Microsoft's advisory.","how_to_check":"- Run `dotnet --version` to see which .NET SDK or runtime is installed\n- unknown","plain_action":"","product_name":".NET","needs_analyst":true,"not_affected_if":[],"who_is_affected":"unknown","user_interaction":"no","product_ecosystem":"runtime","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000652,"input_tokens":4482,"output_tokens":407,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Find the affected .NET versions and the fixed release in the NVD entry at https://nvd.nist.gov/vuln/detail/CVE-2026-109475 or Microsoft's advisory.","search":"'-109475':13A,16A '-2026':12A,15A 'affect':55B 'allow':63C 'attack':8A,34B,66C 'base':26B,58C 'buffer':3A,27B,59C 'caus':38B 'compon':50B 'crash':9A 'cve':11A,14A 'deni':68C 'denial':40B 'dotnet':18B 'face':21B 'let':5A,31B 'net':1A,17A,30B,49B,62C 'network':7A,20B,37B,72C 'network-fac':19B 'overflow':4A,28B,60C 'rang':53B 'runtim':22B 'say':47B 'servic':10A,42B,69C 'sourc':44B 'stack':2A,25B,57C 'stack-bas':24B,56C 'unauthent':33B 'unauthor':65C 'version':52B","nicknames":[],"mitigations":[],"who_affected":null,"tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":["net"],"ptokens":["net"],"labels":["dotnet","high","networkfacing","runtime"],"campaign_type":null,"search_a":"'-109475':13A,16A '-2026':12A,15A 'attack':8A 'buffer':3A 'crash':9A 'cve':11A,14A 'let':5A 'net':1A,17A 'network':7A 'overflow':4A 'servic':10A 'stack':2A","search_b":"'affect':55B 'attack':34B 'base':26B 'buffer':27B 'caus':38B 'compon':50B 'denial':40B 'dotnet':18B 'face':21B 'let':31B 'net':30B,49B 'network':20B,37B 'network-fac':19B 'overflow':28B 'rang':53B 'runtim':22B 'say':47B 'servic':42B 'sourc':44B 'stack':25B 'stack-bas':24B 'unauthent':33B 'version':52B","search_c":"'allow':63C 'attack':66C 'base':58C 'buffer':59C 'deni':68C 'net':62C 'network':72C 'overflow':60C 'servic':69C 'stack':57C 'stack-bas':56C 'unauthor':65C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:18:16+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-109475","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-109475","severity":null,"published_at":"2026-11-10T19:18:16+00:00","modified_at":"2026-11-10T19:18:16+00:00","first_seen_at":"2026-11-10T19:24:24+00:00","fetched_at":"2026-11-10T19:24:24+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"}