CVE-2023-4121

Name: CVE-2023-4121
Creator: NVD / NIST
Published: 2023-08-03T10:15:09.79+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 2.28%

Last modified Jun 17, 2026

CVE-2023-4121 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A vulnerability was found in Byzoro Smart S85F Management Platform up to 20230722. It has been classified as critical. EPSS estimates a 2.28% chance of exploitation in the next 30 days.

Description

A vulnerability was found in Byzoro Smart S85F Management Platform up to 20230722. It has been classified as critical. Affected is an unknown function. The manipulation of the argument file_upload leads to unrestricted upload. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-235968. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

2.28%

80.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-434

Affected Software

Vendor	Product	Versions
Byzoro	Smart S85f	<= 20230722

References

https://github.com/torres14852/cve/blob/main/upload.mdExploit, Third Party Advisory
https://vuldb.com/?ctiid.235968Permissions Required, Third Party Advisory, VDB Entry
https://vuldb.com/?id.235968Third Party Advisory, VDB Entry
https://vuldb.com/?submit.185755
https://github.com/torres14852/cve/blob/main/upload.mdExploit, Third Party Advisory
https://vuldb.com/?ctiid.235968Permissions Required, Third Party Advisory, VDB Entry
https://vuldb.com/?id.235968Third Party Advisory, VDB Entry
https://vuldb.com/?submit.185755

Timeline

Published: Aug 3, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-4121?

How severe is CVE-2023-4121?

CVE-2023-4121 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.28% probability of exploitation in the next 30 days.

How do I fix CVE-2023-4121?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-4121?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST