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TI-2021-11762 Aliases CVE-2021-31727GHSA-hh6m-r6vq-m2mg

Incorrect access control in zam64.sys, zam32.sys in MalwareFox AntiMalware 2.74.0.150…

Priority LOW 34Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

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.

Why it matters now

EPSS 0.00374 31st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:malwarefox:antimalware:2.74.0.150:*:*:*:*:*:*:*2.74.0.150VulnerableMalwarefox
  • cpe:2.3:a:malwarefox:antimalware:2.74.0.150:*:*:*:*:*:*:* Versions 2.74.0.150 Vulnerable ·Malwarefox

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-31727
  2. 2026-10-03 Alias added: GHSA-hh6m-r6vq-m2mg

References

Advisory 1

  • TI-2021-11763 Incorrect access control in zam64.sys, zam32.sys in MalwareFox AntiMalware 2.74.0.150… CVSS 3.1HIGH 7.8
  • TI-2018-04869 An issue was discovered in MalwareFox AntiMalware 2.74.0.150. CVSS 3.0HIGH 7.8
  • TI-2018-04860 An issue was discovered in MalwareFox AntiMalware 2.74.0.150. CVSS 3.0HIGH 7.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences