{"id":"CVE-2010-4398","kind":"vulnerability","aliases":["CVE-2010-4398"],"related":[],"title":"Microsoft Windows: Microsoft Windows Kernel Stack-Based Buffer Overflow Vulnerability","description":"Stack-based buffer overflow in the RtlQueryRegistryValues function in win32k.sys in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP1 and SP2, Windows Server 2008 Gold, SP2, and R2, and Windows 7 allows local users to gain privileges, and bypass the User Account Control (UAC) feature, via a crafted REG_BINARY value for a SystemDefaultEUDCFont registry key, aka \"Driver Improper Interaction with Windows Kernel Vulnerability.\"","summary":"A stack-based buffer overflow in the RtlQueryRegistryValues function in win32k.sys in Microsoft Windows lets a local user gain privileges and bypass User Account Control. CISA lists it as actively exploited in the wild.","severity":"high","cvss":7.8,"epss":0.08661,"exploited":true,"exploited_at":"2022-03-28T00:00:00+00:00","products":[{"name":"Microsoft Windows","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","infrastructure","self-hosted","windows"],"not_affected_if":["patched-windows"],"how_to_check":null,"fix":"Apply the Microsoft updates for the affected Windows version per vendor instructions; the specific patch is not named in the sources.","status":"open","published_at":"2010-12-06T13:44:54+00:00","first_seen_at":"2026-10-23T19:11:52+00:00","triaged_at":"2026-10-23T21:19:49+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-23T21:19:49Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Microsoft updates for the affected Windows version per vendor instructions; the specific patch is not named in the sources.","reach":"local","impact":"high","summary":"A stack-based buffer overflow in the RtlQueryRegistryValues function in win32k.sys in Microsoft Windows lets a local user gain privileges and bypass User Account Control. CISA lists it as actively exploited in the wild.","category":"infrastructure","who_cares":["windows","self-hosted"],"confidence":0.6,"needs_auth":"yes","worst_case":"local user gains SYSTEM privileges and bypasses UAC","analyst_note":"Find the Microsoft bulletin (MS10-073 is the likely match, verify at https://msrc.microsoft.com) and the list of affected Windows builds, then fill in how_to_check and fix.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["patched-windows"],"user_interaction":"no","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000466,"input_tokens":2859,"output_tokens":361,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2010':13A,16A '-4398':14A,17A '2003':81C '2008':90C '7':97C 'account':50B,108C 'activ':56B 'aka':123C 'allow':98C 'base':8A,29B,63C 'binari':116C 'buffer':9A,30B,64C 'bypass':48B,105C 'cisa':52B 'control':51B,109C 'craft':114C 'cve':12A,15A 'driver':124C 'exploit':20B,57B 'featur':111C 'function':35B,69C 'gain':45B,102C 'gold':91C 'host':24B 'improp':125C 'infrastructur':21B 'interact':126C 'kernel':5A,129C 'key':122C 'let':41B 'list':53B 'local':43B,99C 'microsoft':1A,3A,18A,39B,73C 'overflow':10A,31B,65C 'privileg':46B,103C 'r2':94C 'reg':115C 'registri':121C 'rtlqueryregistryvalu':34B,68C 'self':23B 'self-host':22B 'server':80C,89C 'sp1':85C 'sp2':76C,82C,87C,92C 'sp3':78C 'stack':7A,28B,62C 'stack-bas':6A,27B,61C 'systemdefaulteudcfont':120C 'uac':110C 'user':44B,49B,100C,107C 'valu':117C 'via':112C 'vista':84C 'vulner':11A,130C 'wild':60B 'win32k.sys':37B,71C 'window':2A,4A,25B,40B,74C,79C,83C,88C,96C,128C 'windows':19A 'xp':75C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2010-12-06T13:44:54+00:00","kev":{"dateAdded":"2022-03-28","dueDate":"2022-04-21","requiredAction":"Apply updates per vendor instructions.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2010-4398","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2010-4398","severity":null,"published_at":"2022-03-28T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:52+00:00","fetched_at":"2026-10-25T11:39:16+00:00","note":null},{"source":"epss","external_id":"CVE-2010-4398","url":"https://api.first.org/data/v1/epss?cve=CVE-2010-4398","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-2010-4398","url":"https://nvd.nist.gov/vuln/detail/CVE-2010-4398","severity":null,"published_at":"2010-12-06T13:44:54+00:00","modified_at":"2026-06-16T23:24:42+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"}