CVE-2023-23356Network attack vector

Administrator command execution

Published Dec 19, 2024 · Updated Dec 24, 2024

OS command injection in QNAP QuFirewall 2.3.x before 2.3.3 allows remote authenticated users with administrator access to execute commands. QNAP has not disclosed the affected request handler, input field, or operation that passes untrusted data to an operating-system command. Exploitation requires administrator authentication over the network and executes commands on the susceptible QNAP device.

CVSS severity5.5
Medium
EPSS probability0.93%
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

OS command injection in QNAP QuFirewall 2.3.x before 2.3.3 allows remote authenticated users with administrator access to execute commands. QNAP has not disclosed the affected request handler, input field, or operation that passes untrusted data to an operating-system command. Exploitation requires administrator authentication over the network and executes commands on the susceptible QNAP device.

The record

CVE
CVE-2023-23356
Published
Dec 19, 2024
Updated
Dec 24, 2024
Vendor
Linn Products Limited
Product
QuFirewall
Classifications
CWE-78, CWE-77, CAPEC-88, T1059
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Dec 19, 2024CVE publishedPublication date reported by the CVE source.
  2. Dec 24, 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=2.3.x <2.3.3 ( 2023/03/27 )

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Linn Products Limited · QuFirewallversion=2.3.x <2.3.3 ( 2023/03/27 )

Published CVSS scores

7.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
5.5QNAP Systems, Inc.CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N

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)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
CAPEC-88OS Command Injection
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

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