{"id":"CVE-2026-118745","kind":"vulnerability","aliases":["CVE-2026-118745"],"related":[],"title":"Visual Studio: heap buffer overflow lets a network attacker run code","description":"Heap-based buffer overflow in Visual Studio allows an unauthorized attacker to execute code over a network.","summary":"A heap-based buffer overflow in Visual Studio can be triggered over a network without authentication. An attacker who exploits it can execute code on the affected machine.","severity":"high","cvss":8.8,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["other","visual-studio","windows"],"not_affected_if":[],"how_to_check":"- Check the installed Visual Studio version in Visual Studio's About dialog or Visual Studio Installer","fix":null,"status":"open","published_at":"2026-11-10T19:19:51+00:00","first_seen_at":"2026-11-10T19:24:55+00:00","triaged_at":"2026-11-10T19:28:11+00:00","updated_at":"2026-11-10T19:28:11+00:00","category":"other","confidence":0.4,"triage":{"at":"2026-11-10T19:28:11Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"Visual Studio: heap buffer overflow lets a network attacker run code","impact":"high","summary":"A heap-based buffer overflow in Visual Studio can be triggered over a network without authentication. An attacker who exploits it can execute code on the affected machine.","audience":"developers","category":"other","nicknames":[],"who_cares":["visual-studio","windows"],"confidence":0.4,"fix_status":"unknown","needs_auth":"no","worst_case":"code runs on the developer machine via network attack","analyst_note":"Find Microsoft's advisory for CVE-2026-118745 to get affected and fixed Visual Studio versions and the triggering feature.","how_to_check":"- Check the installed Visual Studio version in Visual Studio's About dialog or Visual Studio Installer\n- unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":[],"who_is_affected":"The sources describe only a heap-based buffer overflow in Visual Studio reachable over a network by an unauthorized attacker; affected versions and the triggering feature are not stated. Teams that run Visual Studio on developer machines or build agents should look for the vendor's advisory. unknown","user_interaction":"unknown","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000679,"input_tokens":4488,"output_tokens":460,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Find Microsoft's advisory for CVE-2026-118745 to get affected and fixed Visual Studio versions and the triggering feature.","search":"'-118745':14A,17A '-2026':13A,16A 'affect':50B 'allow':60C 'attack':9A,41B,63C 'authent':39B 'base':26B,54C 'buffer':4A,27B,55C 'code':11A,47B,66C 'cve':12A,15A 'execut':46B,65C 'exploit':43B 'heap':3A,25B,53C 'heap-bas':24B,52C 'let':6A 'machin':51B 'network':8A,37B,69C 'overflow':5A,28B,56C 'run':10A 'studio':2A,21B,31B,59C 'trigger':34B 'unauthor':62C 'visual':1A,20B,30B,58C 'visual-studio':19B 'window':22B 'without':38B","nicknames":[],"mitigations":[],"who_affected":"The sources describe only a heap-based buffer overflow in Visual Studio reachable over a network by an unauthorized attacker; affected versions and the triggering feature are not stated. Teams that run Visual Studio on developer machines or build agents should look for the vendor's advisory. unknown","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"developers","plain_action":null,"pkeys":[],"ptokens":[],"labels":["high","other","visualstudio","windows"],"campaign_type":null,"search_a":"'-118745':14A,17A '-2026':13A,16A 'attack':9A 'buffer':4A 'code':11A 'cve':12A,15A 'heap':3A 'let':6A 'network':8A 'overflow':5A 'run':10A 'studio':2A 'visual':1A","search_b":"'affect':50B 'attack':41B 'authent':39B 'base':26B 'buffer':27B 'code':47B 'execut':46B 'exploit':43B 'heap':25B 'heap-bas':24B 'machin':51B 'network':37B 'overflow':28B 'studio':21B,31B 'trigger':34B 'visual':20B,30B 'visual-studio':19B 'window':22B 'without':38B","search_c":"'allow':60C 'attack':63C 'base':54C 'buffer':55C 'code':66C 'execut':65C 'heap':53C 'heap-bas':52C 'network':69C 'overflow':56C 'studio':59C 'unauthor':62C 'visual':58C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:19:51+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-2026-118745","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118745","severity":null,"published_at":"2026-11-10T19:19:51+00:00","modified_at":"2026-11-10T19:19:51+00:00","first_seen_at":"2026-11-10T19:24:55+00:00","fetched_at":"2026-11-10T19:24:55+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"}