{"id":"CVE-2026-95933","kind":"vulnerability","aliases":["CVE-2026-95933"],"related":[],"title":"Windows OLE: heap buffer overflow lets a local user gain higher privileges","description":"Heap-based buffer overflow in Windows OLE allows an authorized attacker to elevate privileges locally.","summary":"A heap-based buffer overflow in Windows OLE lets an attacker who already has a local account raise their privileges. The sources describe no remote trigger and no public exploit.","severity":"high","cvss":7.8,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["infrastructure","local-privilege-escalation","windows","windows-server"],"not_affected_if":["no-untrusted-local-users"],"how_to_check":"- Open the Microsoft Security Update Guide entry for CVE-2026-95933 (msrc.microsoft.com/update-guide), find your Windows version in the Security Updates table and note the KB number.\n- Run 'winver' for your build, or 'Get-HotFix -Id KB<number>' in PowerShell, to see whether that KB is installed. Affected builds and the KB are unknown until the MSRC page is read.","fix":null,"status":"open","published_at":"2026-11-10T19:21:45+00:00","first_seen_at":"2026-11-10T19:25:24+00:00","triaged_at":"2026-11-10T19:38:17+00:00","updated_at":"2026-11-10T20:24:04+00:00","category":"infrastructure","confidence":0.4,"triage":{"at":"2026-11-10T19:38:17Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Windows OLE: heap buffer overflow lets a local user gain higher privileges","impact":"high","summary":"A heap-based buffer overflow in Windows OLE lets an attacker who already has a local account raise their privileges. The sources describe no remote trigger and no public exploit.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["windows","windows-server"],"confidence":0.6,"fix_status":"unknown","needs_auth":"yes","worst_case":"local attacker gains SYSTEM-level privileges on the machine","analyst_note":"Check the Microsoft Security Update Guide entry for CVE-2026-95933 for affected Windows builds and the patch KB, since the NVD record gives neither.","how_to_check":"- Run `winver` to see the installed Windows build and compare it with the patch list from Microsoft's advisory for CVE-2026-95933\n- Check Windows Update history for the cumulative update that names this CVE\n- unknown otherwise","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":["no-untrusted-local-users"],"who_is_affected":"Any Windows machine where an attacker already has a local user account can be exposed, since the flaw is an elevation of privilege rather than a remote entry point. Multi-user servers, shared terminal hosts and workstations with untrusted local users are the systems to look at first. unknown whether the sources list specific Windows builds.","user_interaction":"unknown","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000722,"input_tokens":4488,"output_tokens":546,"severity_before":"high"},"analyst_status":"done","analyst_note":"Check the Microsoft Security Update Guide entry for CVE-2026-95933 for affected Windows builds and the patch KB, since the NVD record gives neither.","search":"'-2026':14A,17A '-95933':15A,18A 'account':45B 'allow':67C 'alreadi':41B 'attack':39B,70C 'author':69C 'base':31B,61C 'buffer':4A,32B,62C 'cve':13A,16A 'describ':51B 'elev':72C 'escal':23B 'exploit':58B 'gain':10A 'heap':3A,30B,60C 'heap-bas':29B,59C 'higher':11A 'infrastructur':19B 'let':6A,37B 'local':8A,21B,44B,74C 'local-privilege-escal':20B 'ole':2A,36B,66C 'overflow':5A,33B,63C 'privileg':12A,22B,48B,73C 'public':57B 'rais':46B 'remot':53B 'server':27B 'sourc':50B 'trigger':54B 'user':9A 'window':1A,24B,26B,35B,65C 'windows-serv':25B","nicknames":[],"mitigations":[],"who_affected":"Any Windows machine where an attacker already has a local user account can be exposed, since the flaw is an elevation of privilege rather than a remote entry point. Multi-user servers, shared terminal hosts and workstations with untrusted local users are the systems to look at first. unknown whether the sources list specific Windows builds.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["high","infrastructure","localprivilegeescalation","windows","windowsserver"],"campaign_type":null,"search_a":"'-2026':14A,17A '-95933':15A,18A 'buffer':4A 'cve':13A,16A 'gain':10A 'heap':3A 'higher':11A 'let':6A 'local':8A 'ole':2A 'overflow':5A 'privileg':12A 'user':9A 'window':1A","search_b":"'account':45B 'alreadi':41B 'attack':39B 'base':31B 'buffer':32B 'describ':51B 'escal':23B 'exploit':58B 'heap':30B 'heap-bas':29B 'infrastructur':19B 'let':37B 'local':21B,44B 'local-privilege-escal':20B 'ole':36B 'overflow':33B 'privileg':22B,48B 'public':57B 'rais':46B 'remot':53B 'server':27B 'sourc':50B 'trigger':54B 'window':24B,26B,35B 'windows-serv':25B","search_c":"'allow':67C 'attack':70C 'author':69C 'base':61C 'buffer':62C 'elev':72C 'heap':60C 'heap-bas':59C 'local':74C 'ole':66C 'overflow':63C 'privileg':73C 'window':65C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:21:45+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-95933","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-95933","severity":null,"published_at":"2026-11-10T19:21:45+00:00","modified_at":"2026-11-10T19:21:45+00:00","first_seen_at":"2026-11-10T19:25:24+00:00","fetched_at":"2026-11-10T19:25:24+00:00","note":null},{"source":"analyst","external_id":"CVE-2026-95933:2652","url":null,"severity":null,"published_at":"2026-11-10T20:24:04+00:00","modified_at":"2026-11-10T20:24:04+00:00","first_seen_at":"2026-11-10T20:24:04+00:00","fetched_at":"2026-11-10T20:24:04+00:00","note":"Could not read the MSRC Update Guide entry (JavaScript-only, web-cli returned empty) and NVD/cve.org pages are empty or have no build list. No primary source linked, so nothing verified. Affected builds, patch KB and fix are unknown. A browser-cli read of the MSRC page would settle them. Fix status 'none' on the record is not backed by a vendor page."}],"documents":[],"disclosures":[],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}