CVE-2021-34481
HighCVSS 8.8Exploitation Probability (EPSS)
Very high risk99th percentile - higher than 99% of all known CVEs
Summary
A remote code execution vulnerability exists when the Windows Print Spooler service improperly performs privileged file operations. An attacker could run arbitrary code with SYSTEM privileges, install programs, view/change/delete data, or create new accounts with full user rights. Microsoft has released security updates.
Risk Assessment
Risk includes full system compromise by an attacker with SYSTEM privileges, potentially leading to complete takeover and data loss.
Recommendation
Immediately install Microsoft security updates and change the default Point and Print behavior as per KB5005652.
Original NVD description (English source)
A remote code execution vulnerability exists when the Windows Print Spooler service improperly performs privileged file operations. An attacker who successfully exploited this vulnerability could run arbitrary code with SYSTEM privileges. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. UPDATE August 10, 2021: Microsoft has completed the investigation and has released security updates to address this vulnerability. Please see the Security Updates table for the applicable update for your system. We recommend that you install these updates immediately. This security update changes the Point and Print default behavior; please see KB5005652.