{"id":"CVE-2025-33073","published":"2025-06-10T17:23:02Z","modified":"2026-06-17T09:13:04Z","title":"Microsoft Windows SMB Client Improper Access Control Vulnerability","vendor":"Microsoft","product":"Windows","tier":"core","eol":null,"description":{"text":"Improper access control in Windows SMB allows an authorized attacker to elevate privileges over a network.","provenance":"source","from":"NVD"},"summary":{"text":"A flaw in the Windows SMB client component of Microsoft Windows stems from improper access control. 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https://nvd.nist.gov/vuln/detail/CVE-2025-33073","provenance":"source"},"vulncheckKev":{"dateAdded":"2025-10-09","exploitedFirstSeen":"2025-10-09","ransomware":true,"evidence":[{"url":"https://www.enisa.europa.eu/sites/default/files/2025-10/ENISA%20Threat%20Landscape%202025.pdf","date":"2025-10-09"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2025-10-20"},{"url":"https://research.checkpoint.com/2025/27th-october-threat-intelligence-report/","date":"2025-10-27"},{"url":"https://securelist.com/ntlm-abuse-in-2025/118132/","date":"2025-11-26"},{"url":"https://www.loginsoft.com/reports/annually/vulnerability-intelligence-report-2025","date":"2026-01-20"},{"url":"https://ransom-isac.org/blog/the-gentlemen-leak-analysis/","date":"2026-05-15"},{"url":"https://www.microsoft.com/en-us/security/blog/2026/05/22/from-edge-appliance-to-enterprise-compromise-multi-stage-linux-intrusion-via-f5-and-confluence/","date":"2026-05-22"},{"url":"https://unit42.paloaltonetworks.com/the-gentlemen-ransomware/","date":"2026-07-10"}],"evidenceTotal":8,"provenance":"source"},"exploited":true,"otx":{"pulseCount":50,"pulses":[{"name":"Actively_Exploited_Kev 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Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-33073","tags":["US Government Resource"]}],"techniques":[{"id":"T1068","name":"Exploitation for Privilege Escalation","tactics":["privilege-escalation"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: Authorized attacker exploits access control flaw for escalation","mappingType":"exploitation_technique","evidence":[{"from":"description","quote":"Improper access control in Windows SMB allows an authorized attacker to elevate privileges","start":0,"end":90}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"},{"id":"T1078","name":"Valid Accounts","tactics":["initial-access","persistence","privilege-escalation","stealth"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: Elevated privileges obtained via existing authorized access","mappingType":"primary_impact","evidence":[{"from":"description","quote":"allows an authorized attacker to elevate privileges over a network","start":39,"end":105}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2025-17737","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2025-17737","exploited":true,"exploitedSince":"2025-10-20","provenance":"source"},"exploits":[{"id":52330,"url":"https://www.exploit-db.com/exploits/52330","title":"Windows 11 SMB Client - Privilege Escalation & Remote Code Execution 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