CVE-2018-6593
Improper access control in zam32.sys and zam64.sys allows a non-privileged process to register itself with the driver by connecting to the filter communication port and then using IOCTL 0x8000204C to \\.\ZemanaAntiMalware to elevate privileges.
Does this matter?
A public exploit is published in Exploit-DB and the impact is high, while EPSS rates exploitation at 1.1%. Anyone can run this; patch or mitigate before the next change window and check exposed instances for signs of use.
Description
An issue was discovered in MalwareFox AntiMalware 2.74.0.150. Improper access control in zam32.sys and zam64.sys allows a non-privileged process to register itself with the driver by connecting to the filter communication port and then using IOCTL 0x8000204C to \\.\ZemanaAntiMalware to elevate privileges.
- CVSS 3.0
- 7.8 HIGHCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 1.11% probability · 66th percentile
- Public exploits
- 1 in Exploit-DB · first 5 February 2018
- CISA KEV
- Not listed
- Weakness
- CWE-732
- Affected
- malwarefox/antimalware
- Source
- cve@mitre.org
EPSS 1.1% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- https://github.com/SouhailHammou/Exploits/blob/master/CVE-2018-6593/Malwarefox_privescl_0.cThird Party Advisory
- https://www.exploit-db.com/exploits/43973/Exploit, Third Party Advisory, VDB Entry
- https://github.com/SouhailHammou/Exploits/blob/master/CVE-2018-6593/Malwarefox_privescl_0.cThird Party Advisory
- https://www.exploit-db.com/exploits/43973/Exploit, Third Party Advisory, VDB Entry
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.