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Case File

CVE-2021-31728

HIGH · CVSS 7.8 EPSS 3.37% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-05-17 · Last synced 2026-08-04

CyberRota Analysis

This is a high severity vulnerability with a CVSS score of 7.8. Public exploit code or proof-of-concept references have been detected in its references.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
code execution
GitHub PoC Links

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2021-31728
Severity
HIGH
CVSS
7.8
EPSS
3.37%

Original NVD Description

Incorrect access control in zam64.sys, zam32.sys in MalwareFox AntiMalware 2.74.0.150 allows a non-privileged process to open a handle to \.\ZemanaAntiMalware, register itself with the driver by sending IOCTL 0x80002010, allocate executable memory using a flaw in IOCTL 0x80002040, install a hook with IOCTL 0x80002044 and execute the executable memory using this hook with IOCTL 0x80002014 or 0x80002018, this exposes ring 0 code execution in the context of the driver allowing the non-privileged process to elevate privileges.

Related CVEs

Other vulnerabilities affecting the same vendor(s)