CVE-2023-23594: An authentication bypass vulnerability in the web client interface for the CL4NX printer before firmware versi

Q: How do I fix CVE-2023-23594?

cl4nx plus firmware: upgrade to 1.13.3-u724_r2. Exact commands for each OS are on this page.

Q: Is CVE-2023-23594 being exploited?

CVE-2023-23594 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-23594 affect?

CVE-2023-23594 affects cl4nx plus firmware. Severity is critical (CVSS 9.8). An authentication bypass vulnerability in the web client interface for the CL4NX printer before firmware version 1.13.3-u724_r2 provides remote unauthenticated attackers with access to execute commands intended only for valid/authenticated

Q: How urgent is CVE-2023-23594?

Priority 58/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.8REMOTEUPGRADE

CVE-2023-23594 is a critical-severity flaw (CVSS 9.8) affecting cl4nx plus firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An authentication bypass vulnerability in the web client interface for the CL4NX printer before firmware version 1.13.3-u724_r2 provides remote unauthenticated attackers with access to execute commands intended only for valid/authenticated users, such as file uploads and configuration changes.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.5% (top 26%)
CISA exploited list	No
Weakness	CWE-863
Published	2023-03-31
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: sato-global

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-03-31 19:15 UTCPublished CVE record published
2026-06-17 05:37 UTCUpdated Record last modified

sato-global cl4nx plus firmware UPGRADE

Affected: < 1.13.3-u724_r2

Fixed in: 1.13.3-u724_r2

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-23594?

cl4nx plus firmware: upgrade to 1.13.3-u724_r2. Exact commands for each OS are on this page.

Is CVE-2023-23594 being exploited?

CVE-2023-23594 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-23594 affect?

CVE-2023-23594 affects cl4nx plus firmware. Severity is critical (CVSS 9.8). An authentication bypass vulnerability in the web client interface for the CL4NX printer before firmware version 1.13.3-u724_r2 provides remote unauthenticated attackers with access to execute commands intended only for valid/authenticated

How urgent is CVE-2023-23594?

Priority 58/100. Critical severity; Remotely exploitable, no login, no user action

References

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