{"id":"CVE-2022-22047","kind":"vulnerability","aliases":["CVE-2022-22047"],"related":[],"title":"Windows Client Server Run-time Subsystem (CSRSS) Elevation of Privilege Vulnerability","description":"Microsoft Windows CSRSS contains an unspecified vulnerability that allows for privilege escalation to SYSTEM privileges.\n\nCISA required action: Apply updates per vendor instructions.","summary":"Microsoft Windows CSRSS (Client/Server Runtime Subsystem) has a privilege escalation flaw that lets a local user gain SYSTEM privileges. CISA lists it as actively exploited in the wild.","severity":"high","cvss":7.8,"epss":0.18765,"exploited":true,"exploited_at":"2022-07-12T00:00:00+00:00","products":[{"name":"Microsoft Windows","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft windows 10 1507","fixed":["10.0.10240.19360"],"affected":"< 10.0.10240.19360","ecosystem":"vendor"},{"name":"microsoft windows 10 1607","fixed":["10.0.14393.5246"],"affected":"< 10.0.14393.5246","ecosystem":"vendor"},{"name":"microsoft windows 10 1809","fixed":["10.0.17763.3165"],"affected":"< 10.0.17763.3165","ecosystem":"vendor"},{"name":"microsoft windows 10 20h2","fixed":["10.0.19042.1826"],"affected":"< 10.0.19042.1826","ecosystem":"vendor"},{"name":"microsoft windows 10 21h1","fixed":["10.0.19043.1826"],"affected":"< 10.0.19043.1826","ecosystem":"vendor"},{"name":"microsoft windows 10 21h2","fixed":["10.0.19044.1826"],"affected":"< 10.0.19044.1826","ecosystem":"vendor"},{"name":"microsoft windows 11 21h2","fixed":["10.0.22000.795"],"affected":"< 10.0.22000.795","ecosystem":"vendor"},{"name":"microsoft windows 7","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft windows 8.1","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft windows rt 8.1","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft windows server 2008","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft windows server 2008","fixed":[],"affected":"= r2","ecosystem":"vendor"},{"name":"microsoft windows server 2012","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft windows server 2012","fixed":[],"affected":"= r2","ecosystem":"vendor"},{"name":"microsoft windows server 2016","fixed":["10.0.14393.5246"],"affected":"< 10.0.14393.5246","ecosystem":"vendor"},{"name":"microsoft windows server 2019","fixed":["10.0.17763.3165"],"affected":"< 10.0.17763.3165","ecosystem":"vendor"},{"name":"microsoft windows server 2022","fixed":["10.0.20348.825"],"affected":"< 10.0.20348.825","ecosystem":"vendor"},{"name":"microsoft windows server 20h2","fixed":["10.0.19042.1826"],"affected":"< 10.0.19042.1826","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","infrastructure","self-hosted","windows"],"not_affected_if":["fully-patched-windows"],"how_to_check":null,"fix":"Apply the Microsoft Windows updates per vendor instructions; the specific patch KB is not stated in the sources.","status":"open","published_at":"2022-07-12T00:00:00+00:00","first_seen_at":"2026-10-23T19:11:52+00:00","triaged_at":"2026-10-23T21:11:05+00:00","updated_at":"2026-10-23T22:29:04+00:00","category":"infrastructure","confidence":0.7,"triage":{"at":"2026-10-23T21:11:05Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Microsoft Windows updates per vendor instructions; the specific patch KB is not stated in the sources.","reach":"local","impact":"high","summary":"Microsoft Windows CSRSS (Client/Server Runtime Subsystem) has a privilege escalation flaw that lets a local user gain SYSTEM privileges. CISA lists it as actively exploited in the wild.","category":"infrastructure","who_cares":["windows","self-hosted"],"confidence":0.7,"needs_auth":"yes","worst_case":"A local low-privileged user gains SYSTEM rights on the machine.","analyst_note":"Find the Microsoft security update guide entry for CVE-2022-22047 to confirm affected Windows builds and the patch KB numbers.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["fully-patched-windows"],"user_interaction":"no","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000454,"input_tokens":2844,"output_tokens":340,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2022':14A,17A '-22047':15A,18A '10':23A,27A,31A,35A,39A,43A '11':47A '1507':24A '1607':28A '1809':32A '2008':62A,66A '2012':70A,74A '2016':78A '2019':82A '2022':86A '20h2':36A,90A '21h1':40A '21h2':44A,48A '7':51A '8.1':54A,58A 'action':142C 'activ':120B 'allow':133C 'appli':143C 'cisa':116B,140C 'client':2A 'client/server':100B 'contain':128C 'csrss':8A,99B,127C 'cve':13A,16A 'elev':9A 'escal':106B,136C 'exploit':91B,121B 'flaw':107B 'gain':113B 'host':95B 'infrastructur':92B 'instruct':147C 'let':109B 'list':117B 'local':111B 'microsoft':19A,21A,25A,29A,33A,37A,41A,45A,49A,52A,55A,59A,63A,67A,71A,75A,79A,83A,87A,97B,125C 'per':145C 'privileg':11A,105B,115B,135C,139C 'requir':141C 'rt':57A 'run':5A 'run-tim':4A 'runtim':101B 'self':94B 'self-host':93B 'server':3A,61A,65A,69A,73A,77A,81A,85A,89A 'subsystem':7A,102B 'system':114B,138C 'time':6A 'unspecifi':130C 'updat':144C 'user':112B 'vendor':146C 'vulner':12A,131C 'wild':124B 'window':1A,96B,98B,126C 'windows':20A,22A,26A,30A,34A,38A,42A,46A,50A,53A,56A,60A,64A,68A,72A,76A,80A,84A,88A","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2022-07-12T00:00:00+00:00","kev":{"dateAdded":"2022-07-12","dueDate":"2022-08-02","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":"secure@microsoft.com","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2022-22047","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2022-22047","severity":null,"published_at":"2022-07-12T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:52+00:00","fetched_at":"2026-10-25T15:39:42+00:00","note":null},{"source":"epss","external_id":"CVE-2022-22047","url":"https://api.first.org/data/v1/epss?cve=CVE-2022-22047","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-2022-22047","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-22047","severity":null,"published_at":"2022-07-12T23:15:10+00:00","modified_at":"2026-06-17T04:27:33+00:00","first_seen_at":"2026-10-23T22:29:04+00:00","fetched_at":"2026-10-23T22:29:04+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"}