{"id":"CVE-2015-0071","kind":"vulnerability","aliases":["CVE-2015-0071"],"related":[],"title":"Microsoft Internet Explorer 9 through 11 allows remote attackers to bypass the ASLR protection mechanism via a…","description":"Microsoft Internet Explorer allows remote attackers to bypass the address space layout randomization (ASLR) protection mechanism via a crafted web site.\n\nCISA required action: Apply updates per vendor instructions.","summary":"Microsoft Internet Explorer lets a remote attacker defeat ASLR, a memory randomization defense, by serving a crafted web page. CISA lists it as actively exploited, and it is typically used as a step that makes other memory-corruption exploits reliable.","severity":"medium","cvss":6.5,"epss":0.33581,"exploited":true,"exploited_at":"2022-05-25T00:00:00+00:00","products":[{"name":"Microsoft Internet Explorer","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft internet explorer","fixed":[],"affected":"= 9","ecosystem":"vendor"},{"name":"microsoft internet explorer","fixed":[],"affected":"= 10","ecosystem":"vendor"},{"name":"microsoft internet explorer","fixed":[],"affected":"= 11","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["browsers","exploited","internet-explorer","other","windows"],"not_affected_if":["ie-patched","no-ie-installed"],"how_to_check":"Check whether Internet Explorer is installed and which version: run 'reg query \"HKLM\\SOFTWARE\\Microsoft\\Internet Explorer\" /v svcVersion' or check Help > About Internet Explorer.","fix":"Apply the Microsoft security update for Internet Explorer per vendor instructions (CISA KEV required action); the specific patch number is unknown from the sources.\nUpgrade to a supported browser such as Microsoft Edge or a current Chromium/Firefox build, since IE is out of support.","status":"open","published_at":"2015-02-11T03:01:12+00:00","first_seen_at":"2026-10-23T19:11:52+00:00","triaged_at":"2026-10-23T21:15:44+00:00","updated_at":"2026-10-23T22:29:04+00:00","category":"other","confidence":0.6,"triage":{"at":"2026-10-23T21:15:44Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Microsoft security update for Internet Explorer per vendor instructions (CISA KEV required action); the specific patch number is unknown from the sources.\nUpgrade to a supported browser such as Microsoft Edge or a current Chromium/Firefox build, since IE is out of support.","reach":"internet","impact":"high","summary":"Microsoft Internet Explorer lets a remote attacker defeat ASLR, a memory randomization defense, by serving a crafted web page. CISA lists it as actively exploited, and it is typically used as a step that makes other memory-corruption exploits reliable.","category":"other","who_cares":["internet-explorer","windows","browsers"],"confidence":0.6,"needs_auth":"no","worst_case":"Attacker bypasses ASLR, enabling reliable follow-on memory-corruption code execution on the visitor's machine.","analyst_note":"Confirm affected IE versions and the exact Microsoft bulletin (MS15-009) and patch KB at https://www.cisa.gov/known-exploited-vulnerabilities-catalog and the Microsoft Security Response Center.","how_to_check":"Check whether Internet Explorer is installed and which version: run 'reg query \"HKLM\\SOFTWARE\\Microsoft\\Internet Explorer\" /v svcVersion' or check Help > About Internet Explorer.\nunknown","needs_analyst":true,"not_affected_if":["no-ie-installed","ie-patched"],"user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"unknown"},"cost_usd":0.000559,"input_tokens":2841,"output_tokens":549,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-0071':19A,22A '-2015':18A,21A '11':6A '9':4A 'action':106C 'activ':65B 'address':92C 'allow':7A,86C 'appli':107C 'aslr':13A,50B,96C 'attack':9A,48B,88C 'browser':35B 'bypass':11A,90C 'cisa':61B,104C 'corrupt':80B 'craft':58B,101C 'cve':17A,20A 'defeat':49B 'defens':54B 'exploit':36B,66B,81B 'explor':3A,39B,44B,85C 'explorer':25A,28A,31A,34A 'instruct':111C 'internet':2A,24A,27A,30A,33A,38B,43B,84C 'internet-explor':37B 'layout':94C 'let':45B 'list':62B 'make':76B 'mechan':15A,98C 'memori':52B,79B 'memory-corrupt':78B 'microsoft':1A,23A,26A,29A,32A,42B,83C 'page':60B 'per':109C 'protect':14A,97C 'random':53B,95C 'reliabl':82B 'remot':8A,47B,87C 'requir':105C 'serv':56B 'site':103C 'space':93C 'step':74B 'typic':70B 'updat':108C 'use':71B 'vendor':110C 'via':16A,99C 'web':59B,102C 'window':41B","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2015-02-11T03:01:12+00:00","kev":{"dateAdded":"2022-05-25","dueDate":"2022-06-15","requiredAction":"Apply updates per vendor instructions.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2015-0071","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2015-0071","severity":null,"published_at":"2022-05-25T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:52+00:00","fetched_at":"2026-10-25T17:39:57+00:00","note":null},{"source":"epss","external_id":"CVE-2015-0071","url":"https://api.first.org/data/v1/epss?cve=CVE-2015-0071","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-23T19:13:45+00:00","fetched_at":"2026-10-23T19:13:45+00:00","note":null},{"source":"nvd","external_id":"CVE-2015-0071","url":"https://nvd.nist.gov/vuln/detail/CVE-2015-0071","severity":null,"published_at":"2015-02-11T03:01:12+00:00","modified_at":"2026-06-17T00:19:30+00:00","first_seen_at":"2026-10-23T22:29:04+00:00","fetched_at":"2026-10-23T22:29:04+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"}