CVE-2025-33073 · netVigilance record NV25-0206
Microsoft Windows SMB Client Improper Access Control
past due
What to do
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CISA deadline 2025-11-10 · passed 9 months ago · applies to US federal civilian agencies; used elsewhere as a reference SLA
What happened
Microsoft Windows SMB Client contains an improper access control vulnerability that could allow for privilege escalation. An attacker could execute a specially crafted malicious script to coerce the victim machine to connect back to the attack system using SMB and authenticate.
Who is affected
Microsoft Windows. Affected version ranges are listed in the vendor advisory and the NVD entry linked under Sources.
Weakness class: CWE-284.
Timeline
- Added to CISA KEVExploitation in the wild confirmed by CISA
- CISA remediation deadlinepassed 9 months ago
Sources
- NVD entry for CVE-2025-33073 nvd.nist.gov/vuln/detail/CVE-2025-33073
- CISA Known Exploited Vulnerabilities catalog www.cisa.gov/known-exploited-vulnerabilities-catalog
- msrc.microsoft.com msrc.microsoft.com/update-guide/en-US/advisory/CVE-2025-33073
- nvd.nist.gov nvd.nist.gov/vuln/detail/CVE-2025-33073