{"id":"CVE-2026-114164","kind":"vulnerability","aliases":["CVE-2026-114164"],"related":[],"title":"Windows Codecs Library: integer underflow lets a network attacker run code","description":"Integer underflow (wrap or wraparound) in Microsoft Windows Codecs Library allows an unauthorized attacker to execute code over a network.","summary":"Microsoft's Windows Codecs Library has an integer underflow, a math error that wraps a value around. An unauthenticated attacker over the network can use it to execute code.","severity":"high","cvss":8.8,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"Windows Codecs Library","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["infrastructure","windows"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T19:19:09+00:00","first_seen_at":"2026-11-10T19:24:44+00:00","triaged_at":"2026-11-10T19:30:35+00:00","updated_at":"2026-11-10T19:30:35+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-11-10T19:30:35Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"Windows Codecs Library: integer underflow lets a network attacker run code","impact":"high","summary":"Microsoft's Windows Codecs Library has an integer underflow, a math error that wraps a value around. An unauthenticated attacker over the network can use it to execute code.","audience":"everyone","category":"infrastructure","nicknames":[],"who_cares":["windows"],"confidence":0.5,"fix_status":"unknown","needs_auth":"no","worst_case":"Attacker runs code on the Windows machine over the network.","analyst_note":"Confirm affected Windows builds and the Microsoft security update that fixes CVE-2026-114164 via the MSRC advisory.","how_to_check":"unknown","plain_action":"Install the latest Windows security update from Microsoft and check Windows Update for pending patches.","product_name":"Windows Codecs Library","needs_analyst":true,"not_affected_if":[],"who_is_affected":"unknown","user_interaction":"unknown","product_ecosystem":"vendor","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000649,"input_tokens":4509,"output_tokens":396,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Confirm affected Windows builds and the Microsoft security update that fixes CVE-2026-114164 via the MSRC advisory.","search":"'-114164':14A,17A '-2026':13A,16A 'allow':62C 'around':39B 'attack':9A,42B,65C 'code':11A,51B,68C 'codec':2A,26B,60C 'codecs':19A 'cve':12A,15A 'error':34B 'execut':50B,67C 'infrastructur':21B 'integ':4A,30B,52C 'let':6A 'librari':3A,27B,61C 'library':20A 'math':33B 'microsoft':23B,58C 'network':8A,45B,71C 'run':10A 'unauthent':41B 'unauthor':64C 'underflow':5A,31B,53C 'use':47B 'valu':38B 'window':1A,22B,25B,59C 'windows':18A 'wrap':36B,54C 'wraparound':56C","nicknames":[],"mitigations":[],"who_affected":null,"tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"everyone","plain_action":null,"pkeys":["codecslibrary","windowscodecslibrary"],"ptokens":["codecs","library","windows"],"labels":["high","infrastructure","vendor","windows"],"campaign_type":null,"search_a":"'-114164':14A,17A '-2026':13A,16A 'attack':9A 'code':11A 'codec':2A 'codecs':19A 'cve':12A,15A 'integ':4A 'let':6A 'librari':3A 'library':20A 'network':8A 'run':10A 'underflow':5A 'window':1A 'windows':18A","search_b":"'around':39B 'attack':42B 'code':51B 'codec':26B 'error':34B 'execut':50B 'infrastructur':21B 'integ':30B 'librari':27B 'math':33B 'microsoft':23B 'network':45B 'unauthent':41B 'underflow':31B 'use':47B 'valu':38B 'window':22B,25B 'wrap':36B","search_c":"'allow':62C 'attack':65C 'code':68C 'codec':60C 'execut':67C 'integ':52C 'librari':61C 'microsoft':58C 'network':71C 'unauthor':64C 'underflow':53C 'window':59C 'wrap':54C 'wraparound':56C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:19:09+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-2026-114164","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-114164","severity":null,"published_at":"2026-11-10T19:19:09+00:00","modified_at":"2026-11-10T19:19:10+00:00","first_seen_at":"2026-11-10T19:24:44+00:00","fetched_at":"2026-11-10T19:24:44+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"}