{"id":"CVE-2019-1367","kind":"vulnerability","aliases":["CVE-2019-1367"],"related":[],"title":"Microsoft Internet Explorer: Microsoft Internet Explorer Scripting Engine Memory Corruption Vulnerability","description":"Microsoft Internet Explorer contains a memory corruption vulnerability in how the scripting engine handles objects in memory. Successful exploitation allows for remote code execution in the context of the current user.\n\nCISA required action: Apply updates per vendor instructions.","summary":"Internet Explorer's scripting engine mishandles objects in memory, causing memory corruption. An attacker who gets a user to load a malicious page can run code as that user.","severity":"high","cvss":7.6,"epss":0.52449,"exploited":true,"exploited_at":"2021-11-03T00:00:00+00:00","products":[{"name":"Microsoft Internet Explorer","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","internet-explorer","other","ransomware","windows"],"not_affected_if":["no-internet-explorer","patched-systems"],"how_to_check":null,"fix":"Apply the Microsoft security update for this CVE per vendor instructions, as CISA requires. Move users off Internet Explorer if it is still in use.","status":"open","published_at":"2019-09-23T20:15:13+00:00","first_seen_at":"2026-10-23T19:11:53+00:00","triaged_at":"2026-10-23T21:39:14+00:00","updated_at":"2026-10-23T21:57:34+00:00","category":"other","confidence":0.7,"triage":{"at":"2026-10-23T21:39:14Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Microsoft security update for this CVE per vendor instructions, as CISA requires. Move users off Internet Explorer if it is still in use.","reach":"internet","impact":"high","summary":"Internet Explorer's scripting engine mishandles objects in memory, causing memory corruption. An attacker who gets a user to load a malicious page can run code as that user.","category":"other","who_cares":["windows","internet-explorer"],"confidence":0.7,"needs_auth":"no","worst_case":"Attacker runs code as the logged-in user after a malicious page loads.","analyst_note":"Confirm the patched Windows and IE build numbers from the Microsoft advisory for CVE-2019-1367 to fill in how_to_check and fix.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["no-internet-explorer","patched-systems"],"user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000456,"input_tokens":2865,"output_tokens":339,"severity_before":"unknown"},"analyst_status":"queued","analyst_note":"Confirm the patched Windows and IE build numbers from the Microsoft advisory for CVE-2019-1367 to fill in how_to_check and fix.","search":"'-1367':14A,17A '-2019':13A,16A 'action':90C 'allow':76C 'appli':91C 'attack':41B 'caus':37B 'cisa':88C 'code':53B,79C 'contain':60C 'context':83C 'corrupt':10A,39B,63C 'current':86C 'cve':12A,15A 'engin':8A,32B,69C 'execut':80C 'exploit':21B,75C 'explor':3A,6A,24B,29B,59C 'explorer':20A 'get':43B 'handl':70C 'instruct':95C 'internet':2A,5A,19A,23B,28B,58C 'internet-explor':22B 'load':47B 'malici':49B 'memori':9A,36B,38B,62C,73C 'microsoft':1A,4A,18A,57C 'mishandl':33B 'object':34B,71C 'page':50B 'per':93C 'ransomwar':26B 'remot':78C 'requir':89C 'run':52B 'script':7A,31B,68C 'success':74C 'updat':92C 'user':45B,56B,87C 'vendor':94C 'vulner':11A,64C 'window':27B","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2019-09-23T20:15:13+00:00","kev":{"dateAdded":"2021-11-03","dueDate":"2022-05-03","requiredAction":"Apply updates per vendor instructions.","knownRansomwareCampaignUse":"Known"},"cvss_vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2019-1367","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2019-1367","severity":null,"published_at":"2021-11-03T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:53+00:00","fetched_at":"2026-10-25T11:39:18+00:00","note":null},{"source":"epss","external_id":"CVE-2019-1367","url":"https://api.first.org/data/v1/epss?cve=CVE-2019-1367","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-23T19:13:44+00:00","fetched_at":"2026-10-23T19:13:44+00:00","note":null},{"source":"nvd","external_id":"CVE-2019-1367","url":"https://nvd.nist.gov/vuln/detail/CVE-2019-1367","severity":null,"published_at":"2019-09-23T20:15:13+00:00","modified_at":"2026-06-17T02:28:28+00:00","first_seen_at":"2026-10-23T21:57:34+00:00","fetched_at":"2026-10-23T21:57:34+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}