{"id":"CVE-2021-38645","kind":"vulnerability","aliases":["CVE-2021-38645"],"related":[],"title":"Microsoft Open Management Infrastructure (OMI): Microsoft Open Management Infrastructure (OMI) Privilege Escalation Vulnerability","description":"Microsoft Open Management Infrastructure (OMI) within Azure VM Management Extensions contains an unspecified vulnerability that allows for privilege escalation.\n\nCISA required action: Apply updates per vendor instructions.","summary":"Microsoft Open Management Infrastructure (OMI), a management agent used in Azure VM management extensions, contains a flaw that lets a local user escalate privileges. Exploitation is confirmed in the wild, per CISA's Known Exploited Vulnerabilities catalog.","severity":"high","cvss":7.8,"epss":0.02727,"exploited":true,"exploited_at":"2021-11-03T00:00:00+00:00","products":[{"name":"Microsoft Open Management Infrastructure (OMI)","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["azure","exploited","infrastructure","linux","omi"],"not_affected_if":["no-omi-installed"],"how_to_check":null,"fix":"Apply the updates per vendor instructions (CISA required action); specific OMI version numbers are not given in the sources.","status":"open","published_at":"2021-09-15T12:15:14+00:00","first_seen_at":"2026-10-23T19:11:53+00:00","triaged_at":"2026-10-23T21:39:44+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-23T21:39:44Z","model":"claude-haiku-5-5","output":{"fix":"Apply the updates per vendor instructions (CISA required action); specific OMI version numbers are not given in the sources.\nunknown","reach":"local","impact":"high","summary":"Microsoft Open Management Infrastructure (OMI), a management agent used in Azure VM management extensions, contains a flaw that lets a local user escalate privileges. Exploitation is confirmed in the wild, per CISA's Known Exploited Vulnerabilities catalog.","category":"infrastructure","who_cares":["azure","linux","omi"],"confidence":0.6,"needs_auth":"yes","worst_case":"local user gains root-level privileges on the affected machine","analyst_note":"Find the affected OMI versions and patched builds in Microsoft's advisory for CVE-2021-38645 and a check command for the OMI package; the sources give neither.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["no-omi-installed"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000469,"input_tokens":2868,"output_tokens":364,"severity_before":"unknown"},"analyst_status":"queued","analyst_note":"Find the affected OMI versions and patched builds in Microsoft's advisory for CVE-2021-38645 and a check command for the OMI package; the sources give neither.","search":"'-2021':15A,18A '-38645':16A,19A 'action':88C 'agent':37B 'allow':82C 'appli':89C 'azur':25B,40B,73C 'catalog':66B 'cisa':61B,86C 'confirm':56B 'contain':44B,77C 'cve':14A,17A 'escal':12A,52B,85C 'exploit':26B,54B,64B 'extens':43B,76C 'flaw':46B 'infrastructur':4A,9A,27B,33B,70C 'infrastructure':23A 'instruct':93C 'known':63B 'let':48B 'linux':28B 'local':50B 'manag':3A,8A,32B,36B,42B,69C,75C 'management':22A 'microsoft':1A,6A,20A,30B,67C 'omi':5A,10A,24A,29B,34B,71C 'open':2A,7A,21A,31B,68C 'per':60B,91C 'privileg':11A,53B,84C 'requir':87C 'unspecifi':79C 'updat':90C 'use':38B 'user':51B 'vendor':92C 'vm':41B,74C 'vulner':13A,65B,80C 'wild':59B 'within':72C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2021-09-15T12:15:14+00:00","kev":{"dateAdded":"2021-11-03","dueDate":"2021-11-17","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-2021-38645","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-38645","severity":null,"published_at":"2021-11-03T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:53+00:00","fetched_at":"2026-10-25T10:39:08+00:00","note":null},{"source":"epss","external_id":"CVE-2021-38645","url":"https://api.first.org/data/v1/epss?cve=CVE-2021-38645","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-2021-38645","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-38645","severity":null,"published_at":"2021-09-15T12:15:14+00:00","modified_at":"2026-08-10T20:18:58+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"}