{"id":"CVE-2026-96157","kind":"vulnerability","aliases":["CVE-2026-96157"],"related":[],"title":"Windows Media Foundation: heap overflow lets a network attacker run code","description":"Heap-based buffer overflow in Microsoft Windows Media Foundation allows an unauthorized attacker to execute code over a network.","summary":"A heap-based buffer overflow in Microsoft Windows Media Foundation lets an unauthorized attacker run code over the network. The sources give a CVSS score of 9.8 and do not describe the triggering media input or the affected Windows builds.","severity":"critical","cvss":9.8,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["infrastructure","media-foundation","windows"],"not_affected_if":[],"how_to_check":"unknown: MSRC entry lists no affected builds yet. Open https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96157 in a browser and compare your Windows build to the KB table.","fix":null,"status":"open","published_at":"2026-11-10T19:22:13+00:00","first_seen_at":"2026-11-10T19:25:32+00:00","triaged_at":"2026-11-10T19:27:36+00:00","updated_at":"2026-11-10T19:29:13+00:00","category":"infrastructure","confidence":0.3,"triage":{"at":"2026-11-10T19:27:36Z","model":"claude-haiku-5-5","output":{"fix":"- unknown","reach":"network","title":"Windows Media Foundation: heap overflow lets a network attacker run code","impact":"high","summary":"A heap-based buffer overflow in Microsoft Windows Media Foundation lets an unauthorized attacker run code over the network. The sources give a CVSS score of 9.8 and do not describe the triggering media input or the affected Windows builds.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["windows","media-foundation"],"confidence":0.5,"fix_status":"unknown","needs_auth":"no","worst_case":"Attacker runs code on the Windows machine over the network","analyst_note":"Check the Microsoft Security Update Guide entry for CVE-2026-96157 for affected Windows builds, the patch, and whether user interaction is needed.","how_to_check":"- unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":[],"who_is_affected":"Windows systems that use Media Foundation are the likely exposure; the sources do not list affected Windows versions or the specific input that triggers the flaw. unknown","user_interaction":"unknown","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"critical"},"cost_usd":0.000664,"input_tokens":4503,"output_tokens":428,"severity_before":"critical"},"analyst_status":"done","analyst_note":"Check the Microsoft Security Update Guide entry for CVE-2026-96157 for affected Windows builds, the patch, and whether user interaction is needed.","search":"'-2026':13A,16A '-96157':14A,17A '9.8':50B 'affect':61B 'allow':74C 'attack':9A,37B,77C 'base':26B,66C 'buffer':27B,67C 'build':63B 'code':11A,39B,80C 'cve':12A,15A 'cvss':47B 'describ':54B 'execut':79C 'foundat':3A,21B,33B,73C 'give':45B 'heap':4A,25B,65C 'heap-bas':24B,64C 'infrastructur':18B 'input':58B 'let':6A,34B 'media':2A,20B,32B,57B,72C 'media-found':19B 'microsoft':30B,70C 'network':8A,42B,83C 'overflow':5A,28B,68C 'run':10A,38B 'score':48B 'sourc':44B 'trigger':56B 'unauthor':36B,76C 'window':1A,22B,31B,62B,71C","nicknames":[],"mitigations":[],"who_affected":"Windows systems that use Media Foundation are the likely exposure; the sources do not list affected Windows versions or the specific input that triggers the flaw. unknown","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"unknown","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["critical","infrastructure","mediafoundation","windows"],"campaign_type":null,"search_a":"'-2026':13A,16A '-96157':14A,17A 'attack':9A 'code':11A 'cve':12A,15A 'foundat':3A 'heap':4A 'let':6A 'media':2A 'network':8A 'overflow':5A 'run':10A 'window':1A","search_b":"'9.8':50B 'affect':61B 'attack':37B 'base':26B 'buffer':27B 'build':63B 'code':39B 'cvss':47B 'describ':54B 'foundat':21B,33B 'give':45B 'heap':25B 'heap-bas':24B 'infrastructur':18B 'input':58B 'let':34B 'media':20B,32B,57B 'media-found':19B 'microsoft':30B 'network':42B 'overflow':28B 'run':38B 'score':48B 'sourc':44B 'trigger':56B 'unauthor':36B 'window':22B,31B,62B","search_c":"'allow':74C 'attack':77C 'base':66C 'buffer':67C 'code':80C 'execut':79C 'foundat':73C 'heap':65C 'heap-bas':64C 'media':72C 'microsoft':70C 'network':83C 'overflow':68C 'unauthor':76C 'window':71C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:22:13+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-96157","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-96157","severity":null,"published_at":"2026-11-10T19:22:13+00:00","modified_at":"2026-11-10T19:22:13+00:00","first_seen_at":"2026-11-10T19:25:32+00:00","fetched_at":"2026-11-10T19:25:32+00:00","note":null},{"source":"analyst","external_id":"CVE-2026-96157:2508","url":null,"severity":null,"published_at":"2026-11-10T19:29:13+00:00","modified_at":"2026-11-10T19:29:13+00:00","first_seen_at":"2026-11-10T19:29:13+00:00","fetched_at":"2026-11-10T19:29:13+00:00","note":"MSRC page (title confirms Media Foundation RCE) rendered no body via web-cli or browser; NVD empty. No builds, patch, or UI requirement read from a primary source. Nothing verified. Revisit when MSRC lists KBs (likely the Nov 2026 Patch Tuesday)."}],"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"}