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CVE-2021-31728

26
FAUCET Score

CVE-2021-31728 describes an incorrect access control vulnerability in MalwareFox AntiMalware versions 2.74.0.150 and earlier, specifically within its zam64.sys and zam32.sys drivers. This flaw allows a low-privileged local attacker to achieve ring 0 code execution, leading to privilege escalation. The vulnerability has a high CVSS score of 7.8, indicating a local attack vector with low complexity and high impact on confidentiality, integrity, and availability. Currently, there is no evidence of active exploitation, and no public exploit code or significant community discussion has been identified.

Impacted Technologies

VendorProductVersion(s)CPE
2.74.0.150CPE matchmatch criteria
cpe:2.3:a:malwarefox:antimalware:2.74.0.150:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.37%
Probability of exploitation in next 30 days
EPSS Percentile
87.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0337 is in the 97th percentile among its peer group of 17,061 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

github.com / irql0/CVE-2021-31728/blob/master/CVE-2021-31728.md
Third Party Advisory