{"id":"CVE-2026-113749","kind":"vulnerability","aliases":["CVE-2026-113749"],"related":[],"title":"Windows Codecs Library: heap overflow lets a network attacker run code","description":"Heap-based buffer overflow in Microsoft Windows Codecs Library allows an unauthorized attacker to execute code over a network.","summary":"A heap-based buffer overflow in the Microsoft Windows Codecs Library lets an unauthorized attacker execute code over a network. The sources give no further detail on the trigger or affected versions.","severity":"high","cvss":7.5,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["infrastructure","windows"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T19:18:52+00:00","first_seen_at":"2026-11-10T19:24:37+00:00","triaged_at":"2026-11-10T19:45:07+00:00","updated_at":"2026-11-10T19:45:07+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-11-10T19:45:07Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"Windows Codecs Library: heap overflow lets a network attacker run code","impact":"high","summary":"A heap-based buffer overflow in the Microsoft Windows Codecs Library lets an unauthorized attacker execute code over a network. The sources give no further detail on the trigger or affected versions.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["windows"],"confidence":0.5,"fix_status":"unknown","needs_auth":"no","worst_case":"Attacker runs code on the affected Windows machine over the network.","analyst_note":"Find the Microsoft security update guide entry for CVE-2026-113749 to confirm affected Windows builds, fixed versions and whether user interaction is needed.","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":0.00063,"input_tokens":4503,"output_tokens":360,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Find the Microsoft security update guide entry for CVE-2026-113749 to confirm affected Windows builds, fixed versions and whether user interaction is needed.","search":"'-113749':14A,17A '-2026':13A,16A 'affect':51B 'allow':63C 'attack':9A,35B,66C 'base':23B,55C 'buffer':24B,56C 'code':11A,37B,69C 'codec':2A,30B,61C 'cve':12A,15A 'detail':46B 'execut':36B,68C 'give':43B 'heap':4A,22B,54C 'heap-bas':21B,53C 'infrastructur':18B 'let':6A,32B 'librari':3A,31B,62C 'microsoft':28B,59C 'network':8A,40B,72C 'overflow':5A,25B,57C 'run':10A 'sourc':42B 'trigger':49B 'unauthor':34B,65C 'version':52B 'window':1A,19B,29B,60C","nicknames":[],"mitigations":[],"who_affected":null,"tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["high","infrastructure","windows"],"campaign_type":null,"search_a":"'-113749':14A,17A '-2026':13A,16A 'attack':9A 'code':11A 'codec':2A 'cve':12A,15A 'heap':4A 'let':6A 'librari':3A 'network':8A 'overflow':5A 'run':10A 'window':1A","search_b":"'affect':51B 'attack':35B 'base':23B 'buffer':24B 'code':37B 'codec':30B 'detail':46B 'execut':36B 'give':43B 'heap':22B 'heap-bas':21B 'infrastructur':18B 'let':32B 'librari':31B 'microsoft':28B 'network':40B 'overflow':25B 'sourc':42B 'trigger':49B 'unauthor':34B 'version':52B 'window':19B,29B","search_c":"'allow':63C 'attack':66C 'base':55C 'buffer':56C 'code':69C 'codec':61C 'execut':68C 'heap':54C 'heap-bas':53C 'librari':62C 'microsoft':59C 'network':72C 'overflow':57C 'unauthor':65C 'window':60C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:18:52+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:H/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-2026-113749","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-113749","severity":null,"published_at":"2026-11-10T19:18:52+00:00","modified_at":"2026-11-10T19:18:52+00:00","first_seen_at":"2026-11-10T19:24:37+00:00","fetched_at":"2026-11-10T19:24:37+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"}