CVE-2023-1444Public exploit

System crash via null-address write in fildds.sys

Published Mar 17, 2023 · Updated Feb 26, 2025

NULL pointer dereference in Filseclab Twister Antivirus 8 allows local users to crash Windows through the fildds.sys driver. The IOCTL 0x8011206B handler writes to a null address when DeviceIoControl supplies a four-byte input value through the filddsapi device. Any local standard user able to open that device can trigger a Windows blue-screen crash, interrupting the endpoint until it reboots.

CVSS severity6.5
Medium
EPSS probability1.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in Filseclab Twister Antivirus 8 allows local users to crash Windows through the fildds.sys driver. The IOCTL 0x8011206B handler writes to a null address when DeviceIoControl supplies a four-byte input value through the filddsapi device. Any local standard user able to open that device can trigger a Windows blue-screen crash, interrupting the endpoint until it reboots.

The record

CVE
CVE-2023-1444
Published
Mar 17, 2023
Updated
Feb 26, 2025
Vendor
Filseclab Corporation
Product
Twister Antivirus
Classifications
CWE-476, CWE-404, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 17, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 26, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=8

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Filseclab Corporation · Twister Antivirusversion=8

Published CVSS scores

7.5VulDBCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.8VulDBAV:N/AC:L/Au:N/C:N/I:N/A:C
7.5VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
6.5NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
CWE-404Improper Resource Shutdown or Release
T1499Endpoint Denial of Service

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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