CVE-2023-2871Public exploit

Windows crash via unvalidated IOCTL SystemBuffer

Published May 24, 2023 · Updated Nov 22, 2024

Null pointer dereference in FabulaTech USB for Remote Desktop 6.1.0.0 allows local users to crash Windows via crafted IOCTL requests. The ftusbbus2.sys handlers for IOCTLs 0x220448, 0x220420, 0x22040c, and 0x220408 dereference an unvalidated SystemBuffer pointer. A normal local user can trigger a blue-screen crash without user interaction; no data disclosure or modification is reported.

CVSS severity5.5
Medium
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Null pointer dereference in FabulaTech USB for Remote Desktop 6.1.0.0 allows local users to crash Windows via crafted IOCTL requests. The ftusbbus2.sys handlers for IOCTLs 0x220448, 0x220420, 0x22040c, and 0x220408 dereference an unvalidated SystemBuffer pointer. A normal local user can trigger a blue-screen crash without user interaction; no data disclosure or modification is reported.

The record

CVE
CVE-2023-2871
Published
May 24, 2023
Updated
Nov 22, 2024
Vendor
FabulaTech
Product
USB for Remote Desktop
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 24, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 22, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.1.0.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

FabulaTech · USB for Remote Desktopversion=6.1.0.0

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
3.3VulDBCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
1.7VulDBAV:L/AC:L/Au:S/C:N/I:N/A:P

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
T1499.004Application or System Exploitation

Public exploit references

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo