{"id":"CVE-2013-3660","kind":"vulnerability","aliases":["CVE-2013-3660"],"related":[],"title":"Microsoft Win32k: Microsoft Win32k Privilege Escalation Vulnerability","description":"The EPATHOBJ::pprFlattenRec function in win32k.sys in the kernel-mode drivers in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, and Windows Server 2012 does not properly initialize a pointer for the next object in a certain list, which allows local users to obtain write access to the PATHRECORD chain, and consequently gain privileges, by triggering excessive consumption of paged memory and then making many FlattenPath function calls, aka \"Win32k Read AV Vulnerability.\"","summary":"A flaw in the Windows kernel graphics driver win32k.sys lets a local user with a low-privilege account gain higher privileges. CISA lists it as actively exploited in the wild.","severity":"high","cvss":7.8,"epss":0.39318,"exploited":true,"exploited_at":"2022-03-28T00:00:00+00:00","products":[{"name":"Microsoft Win32k","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","infrastructure","microsoft-windows","windows"],"not_affected_if":["patched-systems"],"how_to_check":null,"fix":"Apply the Microsoft updates for CVE-2013-3660 per vendor instructions, as CISA requires.","status":"open","published_at":"2013-05-24T20:55:01+00:00","first_seen_at":"2026-10-23T19:11:52+00:00","triaged_at":"2026-10-23T21:19:47+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"infrastructure","confidence":0.7,"triage":{"at":"2026-10-23T21:19:47Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Microsoft updates for CVE-2013-3660 per vendor instructions, as CISA requires.","reach":"local","impact":"high","summary":"A flaw in the Windows kernel graphics driver win32k.sys lets a local user with a low-privilege account gain higher privileges. CISA lists it as actively exploited in the wild.","category":"infrastructure","who_cares":["windows","microsoft-windows"],"confidence":0.7,"needs_auth":"yes","worst_case":"local user gains SYSTEM privileges on the Windows machine","analyst_note":"Find the Microsoft security bulletin for CVE-2013-3660 to confirm affected Windows versions and the exact patch names; the sources give no version list.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["patched-systems"],"user_interaction":"no","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000449,"input_tokens":2857,"output_tokens":326,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2013':9A,12A '-3660':10A,13A '2003':74C '2008':81C '2012':94C '7':87C '8':90C 'access':116C 'account':40B 'activ':48B 'aka':139C 'allow':110C 'av':142C 'call':138C 'certain':107C 'chain':120C 'cisa':44B 'consequ':122C 'consumpt':128C 'cve':8A,11A 'driver':29B,64C 'epathobj':54C 'escal':6A 'excess':127C 'exploit':16B,49B 'flattenpath':136C 'flaw':23B 'function':56C,137C 'gain':41B,123C 'graphic':28B 'higher':42B 'infrastructur':17B 'initi':98C 'kernel':27B,62C 'kernel-mod':61C 'let':31B 'list':45B,108C 'local':33B,111C 'low':38B 'low-privileg':37B 'make':134C 'mani':135C 'memori':131C 'microsoft':1A,3A,14A,19B,66C 'microsoft-window':18B 'mode':63C 'next':103C 'object':104C 'obtain':114C 'page':130C 'pathrecord':119C 'pointer':100C 'pprflattenrec':55C 'privileg':5A,39B,43B,124C 'proper':97C 'r2':84C 'read':141C 'server':73C,80C,93C 'sp1':85C,88C 'sp2':69C,75C,78C,82C 'sp3':71C 'trigger':126C 'user':34B,112C 'vista':77C 'vulner':7A,143C 'wild':52B 'win32k':2A,4A,15A,140C 'win32k.sys':30B,58C 'window':20B,21B,26B,67C,72C,76C,79C,86C,89C,92C 'write':115C 'xp':68C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2013-05-24T20:55:01+00:00","kev":{"dateAdded":"2022-03-28","dueDate":"2022-04-18","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-2013-3660","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2013-3660","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":"2026-10-25T10:39:07+00:00","note":null},{"source":"epss","external_id":"CVE-2013-3660","url":"https://api.first.org/data/v1/epss?cve=CVE-2013-3660","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-2013-3660","url":"https://nvd.nist.gov/vuln/detail/CVE-2013-3660","severity":null,"published_at":"2013-05-24T20:55:01+00:00","modified_at":"2026-06-16T23:55:35+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"}