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CVE-2025-33073: Windows SMB Client Zero-Day Lets Attackers Gain SYSTEM Privileges
- The number of discovered vulnerabilities is growing at an unprecedented pace, with over 21,000 new CVEs recorded by NIST this year and a projected 49,000+ by year’s end.
- Microsoft addressed a critical zero-day vulnerability (CVE-2025-33073) in its latest Patch Tuesday release, impacting the Windows SMB client.
- Vulnerability exploitation was a common initial access vector for attackers in 2024, emphasizing the need for constant monitoring and proactive defense.
- Security professionals can access threat intelligence on SOC Prime Platform to identify and respond to attacks, including those exploiting zero-day vulnerabilities.
- CVE-2025-33073 allows attackers to escalate privileges to the SYSTEM level on Windows devices through the SMB protocol's improper access controls.
- An attacker can trick a machine into authenticating to a rogue SMB server, granting them SYSTEM-level access and control over the compromised system.
- Exploiting CVE-2025-33073 enables attackers to disable security tools, access sensitive data, install malware, and move laterally within networks.
- Immediate patching or enabling server-side SMB signing through Group Policy can mitigate the risks associated with this vulnerability.
- The SOC Prime Platform offers AI-powered technologies to help organizations detect and prevent attacks like zero-day exploitations proactively.
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