{"id":"CVE-2014-4077","kind":"vulnerability","aliases":["CVE-2014-4077"],"related":[],"title":"Microsoft Input Method Editor (IME) Japanese: Microsoft IME Japanese Privilege Escalation Vulnerability","description":"Microsoft Input Method Editor (IME) Japanese is a keyboard with Japanese characters that can be enabled on Windows systems as it is included by default (with the default set as disabled). IME Japanese contains an unspecified vulnerability when IMJPDCT.EXE (IME for Japanese) is installed which allows attackers to bypass a sandbox and perform privilege escalation.\n\nCISA required action: Apply updates per vendor instructions.","summary":"Microsoft Input Method Editor (IME) Japanese contains a flaw in IMJPDCT.EXE that lets an attacker bypass a sandbox and gain elevated privileges on Windows. CISA lists it as actively exploited in the wild.","severity":"critical","cvss":9.3,"epss":0.54577,"exploited":true,"exploited_at":"2022-05-25T00:00:00+00:00","products":[{"name":"Microsoft Input Method Editor (IME) Japanese","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","infrastructure","japanese-ime","windows"],"not_affected_if":["default-config","ime-japanese-not-installed"],"how_to_check":null,"fix":"Apply the Microsoft updates for this CVE per vendor instructions; the exact KB or build is not in the sources.\nIf Japanese IME is not needed, disable it in Windows language settings.","status":"open","published_at":"2014-11-11T22:55:04+00:00","first_seen_at":"2026-10-23T19:11:52+00:00","triaged_at":"2026-10-23T21:13:01+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-23T21:13:01Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Microsoft updates for this CVE per vendor instructions; the exact KB or build is not in the sources.\nIf Japanese IME is not needed, disable it in Windows language settings.","reach":"local","impact":"high","summary":"Microsoft Input Method Editor (IME) Japanese contains a flaw in IMJPDCT.EXE that lets an attacker bypass a sandbox and gain elevated privileges on Windows. CISA lists it as actively exploited in the wild.","category":"infrastructure","who_cares":["windows","japanese-ime"],"confidence":0.6,"needs_auth":"yes","worst_case":"Local attacker escapes sandbox and gains elevated system privileges on Windows.","analyst_note":"Find the vendor advisory and the affected/fixed Windows builds; sources give no version info and no detection method.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["ime-japanese-not-installed","default-config"],"user_interaction":"unknown","needs_special_setup":"yes","severity_if_unknown":"high"},"cost_usd":0.000483,"input_tokens":2933,"output_tokens":379,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2014':14A,17A '-4077':15A,18A 'action':121C 'activ':59B 'allow':109C 'appli':122C 'attack':45B,110C 'bypass':46B,112C 'charact':75C 'cisa':55B,119C 'contain':37B,97C 'cve':13A,16A 'default':88C,91C 'disabl':94C 'editor':4A,22A,34B,67C 'elev':51B 'enabl':79C 'escal':11A,118C 'exploit':25B,60B 'flaw':39B 'gain':50B 'ime':5A,8A,23A,29B,35B,68C,95C,103C 'imjpdct.exe':41B,102C 'includ':86C 'infrastructur':26B 'input':2A,20A,32B,65C 'instal':107C 'instruct':126C 'japanes':6A,9A,28B,36B,69C,74C,96C,105C 'japanese':24A 'japanese-im':27B 'keyboard':72C 'let':43B 'list':56B 'method':3A,21A,33B,66C 'microsoft':1A,7A,19A,31B,64C 'per':124C 'perform':116C 'privileg':10A,52B,117C 'requir':120C 'sandbox':48B,114C 'set':92C 'system':82C 'unspecifi':99C 'updat':123C 'vendor':125C 'vulner':12A,100C 'wild':63B 'window':30B,54B,81C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2014-11-11T22:55:04+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:L/AC:L/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-2014-4077","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2014-4077","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-2014-4077","url":"https://api.first.org/data/v1/epss?cve=CVE-2014-4077","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-2014-4077","url":"https://nvd.nist.gov/vuln/detail/CVE-2014-4077","severity":null,"published_at":"2014-11-11T22:55:04+00:00","modified_at":"2026-06-17T00:09:23+00:00","first_seen_at":"2026-10-23T21:57:35+00:00","fetched_at":"2026-10-23T21:57:35+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"}