CVE-2023-1638

IObit Malware Fighter IOCTL ImfRegistryFilter.sys 0x8001E040 denial of service

Public exploit available. Not confirmed exploited in the wild yet. A vendor fix is available.

CVSS 3.15.5Medium EPSS percentile22nd0.3% chance in 30 days CISA KEVNot listedNo confirmed exploitation
Public exploit: 2 sources FixVendor fixNo build named by the sources

Published 2023-03-26Updated 2024-11-21Sources: CVE.org, NVD, BDU

NVD CVE.org

What to do

The vendor has published a fix. Version details are below where the sources state them.

Is your organisation exposed?Request an assessment to establish which checks fit your systems.

What it is

From the CVE record

A vulnerability was found in IObit Malware Fighter 9.4.0.776. It has been rated as problematic. Affected by this issue is the function 0x8001E024/0x8001E040 in the library ImfRegistryFilter.sys of the component IOCTL Handler. The manipulation leads to denial of service. Attacking locally is a requirement. The exploit has been disclosed to the public and may be used. VDB-224018 is the identifier assigned to this vulnerability.

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS22nd

Public exploit

CISA KEV

Not in the catalog. CISA has not confirmed exploitation.

Public exploits

2 sources with a proof of concept or module.

Exploit links, PoCs and Metasploit modules after sign-in

EPSS

0.3% chance of exploitation activity in the next 30 days, which ranks it in the 22nd percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

The patch came 471 days before any public exploit.

2026-03-06Public exploit / PoCsource: github-poc
2024-11-21Patch availablerecord updated
2023-03-26Publishedweakness classified

Affected products

IObitcommercial · CNaka advanced systemcare ultimate, malware fighter
- Malware FighterSecurity ProductSecurity Products / endpoint-av-edr
IOBit Softwarecommercialaka iobit, advanced systemcare, iobit uninstaller, iobit malware fighter
- Malware FighterOn-premSecurity Products / endpoint-av-edr

And 1 more affected product. See all after sign-in

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

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

Scored 5.5 by NVD.

How it is reached

Attack Vector LocalRequires local access to the vulnerable system (e.g. local login, malicious file)
Attack Complexity LowNo special conditions — the attack can be reliably reproduced
Privileges Required LowRequires basic user-level privileges
User Interaction NoneNo user interaction needed — fully automated exploitation

Scope

Scope UnchangedImpact is limited to the vulnerable component itself

Impact if exploited

Confidentiality NoneNo confidentiality impact
Integrity NoneNo integrity impact
Availability HighTotal denial of service — the component is completely unavailable

Weaknesses

CWE-404No name in the record

Sources

References in the record

And 4 more references. See all after sign-in

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