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CVE-2021-31727

HIGH

7.8

CVSS Score

Published: May 17, 2021 at 12:05 PM UTC

Updated: June 17, 2026 at 03:52 AM UTC

1 product affected across 1 vendorAntimalware

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Severity

HIGH7.8

Exploit prediction

EPSS 0.4%

Description

Incorrect access control in zam64.sys, zam32.sys in MalwareFox AntiMalware 2.74.0.150 where IOCTL's 0x80002014, 0x80002018 expose unrestricted disk read/write capabilities respectively. A non-privileged process can open a handle to \.\ZemanaAntiMalware, register with the driver using IOCTL 0x80002010 and send these IOCTL's to escalate privileges by overwriting the boot sector or overwriting critical code in the pagefile.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Antimalware · Malwarefox

95%

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

x_refsource_MISCThird Party Advisory

Source: [email protected]

https://github.com/irql0/CVE-2021-31728/blob/master/CVE-2021-31727.md

CVSS

7.8HIGH[email protected]

Attack Vector: LOCAL
Complexity: LOW
Privileges: LOW
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

NVD-CWE-Other

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