CVE-2026-83759

Summary

This vulnerability allows an authenticated attacker to inject malicious code into the Windows Encrypting File System (EFS), potentially enabling remote code execution. The flaw occurs when EFS improperly handles code generation, creating a path for attackers to execute arbitrary commands over the network.

Exploitability

Exploitation requires an authenticated user account with access to EFS functionality, making it moderately difficult but not highly complex to achieve, with the main precondition being network access to the target system.

Blast radius

If exploited, this vulnerability could allow attackers to execute arbitrary code on affected Windows systems with high privileges, potentially leading to full system compromise and lateral movement across the network.

Detection

No reliable host or network indicator is derivable from the published description.

Prioritized remediation

Apply the latest Windows updates that include the EFS code injection fix, specifically targeting the Windows 10 22H2 and Windows 11 22H2 releases which contain the patched EFS implementation.

Analysis generated locally by garnet-coder (no data left the box). AI-assisted — verify against primary sources before acting.