{"id":"CVE-2026-105578","kind":"vulnerability","aliases":["CVE-2026-105578"],"related":[],"title":"Microsoft JScript: integer overflow lets an unauthorized network attacker run code","description":"Integer overflow or wraparound in Microsoft JScript allows an unauthorized attacker to execute code over a network.","summary":"Microsoft JScript has an integer overflow or wraparound flaw. The NVD entry says an unauthorized attacker can exploit it over a network to execute code.","severity":"high","cvss":7.5,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"Microsoft JScript","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["jscript","microsoft","other","windows"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T19:18:00+00:00","first_seen_at":"2026-11-10T19:24:20+00:00","triaged_at":"2026-11-10T19:47:28+00:00","updated_at":"2026-11-10T19:47:28+00:00","category":"other","confidence":0.4,"triage":{"at":"2026-11-10T19:47:28Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"Microsoft JScript: integer overflow lets an unauthorized network attacker run code","impact":"high","summary":"Microsoft JScript has an integer overflow or wraparound flaw. The NVD entry says an unauthorized attacker can exploit it over a network to execute code.","audience":"businesses","category":"other","nicknames":[],"who_cares":["microsoft","jscript","windows"],"confidence":0.4,"fix_status":"unknown","needs_auth":"no","worst_case":"code runs on the affected machine via network attack","analyst_note":"Find the Microsoft Security Response Center advisory for CVE-2026-105578 to confirm affected versions, fixed builds and any workaround.","how_to_check":"unknown","plain_action":"","product_name":"Microsoft JScript","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":0.000635,"input_tokens":4492,"output_tokens":372,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Find the Microsoft Security Response Center advisory for CVE-2026-105578 to confirm affected versions, fixed builds and any workaround.","search":"'-105578':14A,17A '-2026':13A,16A 'allow':56C 'attack':9A,39B,59C 'code':11A,48B,62C 'cve':12A,15A 'entri':35B 'execut':47B,61C 'exploit':41B 'flaw':32B 'integ':3A,28B,49C 'jscript':2A,19A,20B,25B,55C 'let':5A 'microsoft':1A,18A,21B,24B,54C 'network':8A,45B,65C 'nvd':34B 'overflow':4A,29B,50C 'run':10A 'say':36B 'unauthor':7A,38B,58C 'window':23B 'wraparound':31B,52C","nicknames":[],"mitigations":[],"who_affected":null,"tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":["jscript","microsoftjscript"],"ptokens":["jscript","microsoft"],"labels":["high","jscript","microsoft","other","vendor","windows"],"campaign_type":null,"search_a":"'-105578':14A,17A '-2026':13A,16A 'attack':9A 'code':11A 'cve':12A,15A 'integ':3A 'jscript':2A,19A 'let':5A 'microsoft':1A,18A 'network':8A 'overflow':4A 'run':10A 'unauthor':7A","search_b":"'attack':39B 'code':48B 'entri':35B 'execut':47B 'exploit':41B 'flaw':32B 'integ':28B 'jscript':20B,25B 'microsoft':21B,24B 'network':45B 'nvd':34B 'overflow':29B 'say':36B 'unauthor':38B 'window':23B 'wraparound':31B","search_c":"'allow':56C 'attack':59C 'code':62C 'execut':61C 'integ':49C 'jscript':55C 'microsoft':54C 'network':65C 'overflow':50C 'unauthor':58C 'wraparound':52C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:18:00+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-2026-105578","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-105578","severity":null,"published_at":"2026-11-10T19:18:00+00:00","modified_at":"2026-11-10T19:18:00+00:00","first_seen_at":"2026-11-10T19:24:20+00:00","fetched_at":"2026-11-10T19:24:20+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"}