How severe is CVE-2018-6593?

CVE-2018-6593 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-6593 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-6593?

CVE-2018-6593 affects Malwarefox Antimalware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-6593?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2018-6593 published?

CVE-2018-6593 was published on 2018-02-03 and last updated on 2026-06-17.

CVE-2018-6593

CVE-2018-6593 is a high-severity vulnerability in Malwarefox Antimalware with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-732.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 4.6
EPSS exploit prediction: 1% (63rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-732
Affected product: Malwarefox Antimalware
Published: 2018-02-03
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2018-6593?: 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.
How severe is CVE-2018-6593?: CVE-2018-6593 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-6593 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-6593?: CVE-2018-6593 affects Malwarefox Antimalware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-6593?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-6593 published?: CVE-2018-6593 was published on 2018-02-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:malwarefox:antimalware:2.74.0.150:*:*:*:*:*:*:*

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CVE-2021-31728 — High (CVSS 7.8): Incorrect access control in zam64.sys, zam32.sys in MalwareFox AntiMalware 2.74.0.150 allows a non-privileged process…
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