{"id":"CVE-2023-36802","kind":"vulnerability","aliases":["CVE-2023-36802"],"related":[],"title":"Microsoft Streaming Service Proxy Elevation of Privilege Vulnerability","description":"Microsoft Streaming Service Proxy contains an unspecified vulnerability that allows for privilege escalation.\n\nCISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","summary":"Microsoft Streaming Service Proxy has a privilege escalation flaw that lets a local user gain higher privileges on Windows. CISA lists it as actively exploited in the wild.","severity":"high","cvss":7.8,"epss":null,"exploited":true,"exploited_at":"2023-09-12T00:00:00+00:00","products":[{"name":"Microsoft Streaming Service Proxy","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft windows 10 1809","fixed":["10.0.17763.4851"],"affected":"< 10.0.17763.4851","ecosystem":"vendor"},{"name":"microsoft windows 10 21h2","fixed":["10.0.19044.3448"],"affected":"< 10.0.19044.3448","ecosystem":"vendor"},{"name":"microsoft windows 10 22h2","fixed":["10.0.19045.3448"],"affected":"< 10.0.19045.3448","ecosystem":"vendor"},{"name":"microsoft windows 11 21h2","fixed":["10.0.22000.2416"],"affected":"< 10.0.22000.2416","ecosystem":"vendor"},{"name":"microsoft windows 11 22h2","fixed":["10.0.22621.2275"],"affected":"< 10.0.22621.2275","ecosystem":"vendor"},{"name":"microsoft windows server 2019","fixed":["10.0.17763.4851"],"affected":"< 10.0.17763.4851","ecosystem":"vendor"},{"name":"microsoft windows server 2022","fixed":["10.0.20348.1970"],"affected":"< 10.0.20348.1970","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","infrastructure","microsoft","windows"],"not_affected_if":["unknown"],"how_to_check":null,"fix":"Apply mitigations per vendor instructions, or discontinue use of the product if mitigations are unavailable. Specific patch version unknown.","status":"open","published_at":"2023-09-12T00:00:00+00:00","first_seen_at":"2026-10-23T19:11:51+00:00","triaged_at":"2026-10-23T21:04:42+00:00","updated_at":"2026-10-23T22:29:04+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-10-23T21:04:42Z","model":"claude-haiku-5-5","output":{"fix":"Apply mitigations per vendor instructions, or discontinue use of the product if mitigations are unavailable. Specific patch version unknown.","reach":"local","impact":"high","summary":"Microsoft Streaming Service Proxy has a privilege escalation flaw that lets a local user gain higher privileges on Windows. CISA lists it as actively exploited in the wild.","category":"infrastructure","who_cares":["windows","microsoft"],"confidence":0.5,"needs_auth":"yes","worst_case":"Local attacker gains elevated system privileges on the Windows host.","analyst_note":"Find Microsoft's advisory for CVE-2023-36802 to get affected builds, patch KB numbers and the detection method.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["unknown"],"user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000444,"input_tokens":2818,"output_tokens":325,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2023':10A,13A '-36802':11A,14A '10':21A,25A,29A '11':33A,37A '1809':22A '2019':42A '2022':46A '21h2':26A,34A '22h2':30A,38A 'action':94C 'activ':74B 'allow':88C 'appli':95C 'cisa':70B,92C 'contain':83C 'cve':9A,12A 'discontinu':101C 'elev':5A 'escal':58B,91C 'exploit':47B,75B 'flaw':59B 'gain':65B 'higher':66B 'infrastructur':48B 'instruct':99C 'let':61B 'list':71B 'local':63B 'microsoft':1A,15A,19A,23A,27A,31A,35A,39A,43A,49B,51B,79C 'mitig':96C,107C 'per':97C 'privileg':7A,57B,67B,90C 'product':105C 'proxi':4A,54B,82C 'proxy':18A 'requir':93C 'server':41A,45A 'servic':3A,53B,81C 'service':17A 'stream':2A,52B,80C 'streaming':16A 'unavail':109C 'unspecifi':85C 'use':102C 'user':64B 'vendor':98C 'vulner':8A,86C 'wild':78B 'window':50B,69B 'windows':20A,24A,28A,32A,36A,40A,44A","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2023-09-12T00:00:00+00:00","kev":{"dateAdded":"2023-09-12","dueDate":"2023-10-03","requiredAction":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","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-2023-36802","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-36802","severity":null,"published_at":"2023-09-12T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:51+00:00","fetched_at":"2026-10-25T16:39:47+00:00","note":null},{"source":"nvd","external_id":"CVE-2023-36802","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-36802","severity":null,"published_at":"2023-09-12T17:15:15+00:00","modified_at":"2026-06-17T06:07:06+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"}