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No exploitation reported

CVE-2023-4121

No exploitation reported by the sources we read.

  • Published2023-08-03
  • WeaknessCWE-434

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2023-08-0310:15CVE publishedNVD

Versions per branch

NVD
Byzoro smart s85f
BranchAffectedFixed in
20230722.x≤ 20230722no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • CNACVSS 3.16.3known since 2026-10-23
  • NVDCVSS 3.19.8read 2026-10-23
  • CNACVSS 2.06.5known since 2026-10-23
  • CNAweakness (CWE)CWE-434known since 2026-10-23
  • FIRST EPSSEPSS score2.5 %2026-11-08
  • GitHub Advisoriesadvisory—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2023-08-03
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-6wxp-8624-h2hh

Frequently asked questions

What is CVE-2023-4121?

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.

Is CVE-2023-4121 actively exploited?

Active exploitation of CVE-2023-4121 has not been confirmed. Its EPSS score was 2.5% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

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

CVE-2023-4121 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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