Improper access control in Windows SMB allows an authorized attacker to elevate privileges over a network.
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Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2025-10-20), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 8.8 retained for reference. Confidence: HIGH.
Improper access control in Windows SMB allows an authorized attacker to elevate privileges over a network.
June 10, 2025
October 27, 2025
Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-33073Security Update Guide - Microsoft Security Response Center. Patch available via Microsoft Security Update
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-33073MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.
Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.
Working exploit code is in the public domain (3 GitHub PoCs) (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.
cupntlm
Open source ↗Universal exploitation tool for CVE-2025-33073 targeting Windows Domain Controllers with DNSAdmins privileges and WinRM enabled.
Open source ↗Windows 11 SMB Client - Privilege Escalation & Remote Code Execution (RCE)
Open source ↗PoC Exploit for the NTLM reflection SMB flaw.
Open source ↗See which npm, PyPI, Go, and Maven packages are affected by CVE-2025-33073
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.
msrc
CWE-284