{"id":"CVE-2017-0263","kind":"vulnerability","aliases":["CVE-2017-0263"],"related":[],"title":"Microsoft Win32k: Microsoft Win32k Privilege Escalation Vulnerability","description":"The kernel-mode drivers in Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, 1703, and Windows Server 2016 allow local users to gain privileges via a crafted application, aka \"Win32k Elevation of Privilege Vulnerability.\"","summary":"Microsoft Win32k, the Windows kernel-mode graphics driver, mishandles objects in memory and allows privilege escalation. A local attacker who can already run code on the machine can gain higher privileges, and CISA lists it as exploited in the wild.","severity":"high","cvss":7.8,"epss":0.10034,"exploited":true,"exploited_at":"2022-02-10T00:00:00+00:00","products":[{"name":"Microsoft Win32k","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","infrastructure","microsoft-win32k","windows"],"not_affected_if":["patched-systems"],"how_to_check":null,"fix":"Apply the Microsoft security update for CVE-2017-0263 per vendor instructions (CISA required action).","status":"open","published_at":"2017-05-12T14:29:05+00:00","first_seen_at":"2026-10-23T19:11:53+00:00","triaged_at":"2026-10-23T21:28:50+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-23T21:28:50Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Microsoft security update for CVE-2017-0263 per vendor instructions (CISA required action).\nunknown","reach":"local","impact":"high","summary":"Microsoft Win32k, the Windows kernel-mode graphics driver, mishandles objects in memory and allows privilege escalation. A local attacker who can already run code on the machine can gain higher privileges, and CISA lists it as exploited in the wild.","category":"infrastructure","who_cares":["windows","microsoft-win32k"],"confidence":0.6,"needs_auth":"yes","worst_case":"local user gains SYSTEM privileges on the Windows machine","analyst_note":"Fetch the Microsoft security bulletin for CVE-2017-0263 to confirm affected Windows builds and the patch KB numbers, and to get a version check.","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":0.000462,"input_tokens":2831,"output_tokens":357,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-0263':10A,13A '-2017':9A,12A '10':92C '1511':94C '1607':95C '1703':96C '2008':72C '2012':84C '2016':100C '7':78C '8.1':81C,90C 'aka':111C 'allow':36B,101C 'alreadi':44B 'applic':110C 'attack':41B 'cisa':55B 'code':46B 'craft':109C 'cve':8A,11A 'driver':30B,67C 'elev':113C 'escal':6A,38B 'exploit':16B,59B 'gain':51B,105C 'gold':85C,93C 'graphic':29B 'higher':52B 'infrastructur':17B 'kernel':27B,65C 'kernel-mod':26B,64C 'list':56B 'local':40B,102C 'machin':49B 'memori':34B 'microsoft':1A,3A,14A,19B,22B,69C 'microsoft-win32k':18B 'mishandl':31B 'mode':28B,66C 'object':32B 'privileg':5A,37B,53B,106C,115C 'r2':75C,87C 'rt':89C 'run':45B 'server':71C,83C,99C 'sp1':76C,79C 'sp2':73C 'user':103C 'via':107C 'vulner':7A,116C 'wild':62B 'win32k':2A,4A,15A,20B,23B,112C 'window':21B,25B,70C,77C,80C,82C,88C,91C,98C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2017-05-12T14:29:05+00:00","kev":{"dateAdded":"2022-02-10","dueDate":"2022-08-10","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-2017-0263","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2017-0263","severity":null,"published_at":"2022-02-10T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:53+00:00","fetched_at":"2026-10-25T13:39:32+00:00","note":null},{"source":"epss","external_id":"CVE-2017-0263","url":"https://api.first.org/data/v1/epss?cve=CVE-2017-0263","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-2017-0263","url":"https://nvd.nist.gov/vuln/detail/CVE-2017-0263","severity":null,"published_at":"2017-05-12T14:29:05+00:00","modified_at":"2026-06-17T00:57:21+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"}