Is CVE-2023-4121 actively exploited?

No active exploitation of CVE-2023-4121 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-4121 be exploited remotely?

Yes. CVE-2023-4121 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-4121?

CVE-2023-4121 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2023-4121

CWE-434Published: August 3, 2023· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official 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.

NVD Source

Risk Analysis

The Byzoro Smart S85F Management Platform is vulnerable to unrestricted file uploads, which could allow an attacker to upload malicious files to the server. This critical flaw is remotely exploitable.

No public exploit is known, and it is not in the KEV database. The vulnerability is remotely exploitable.

Recommended Action

Restrict access to the management platform and monitor for unauthorized file uploads until a patch is available.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2023-4121 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.