Smart S85fApplication · Byzoro

CVE-2023-4414

CRITICAL · 9.8 CVSS v3.1 Published 2023-08-18
Fix available
A fix is available. Upgrade to after 2023-08-07 or later.
See remediation →
100/100
Remediation priority · Urgent
Public exploit Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
A vulnerability was found in Byzoro Smart S85F Management Platform up to 20230807. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the file /log/decodmail.php. The manipulation of the argument file leads to command injection. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The identifier VDB-237517 was assigned to this vulnerability. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis
How this class of weakness works · CWE-77

User input reaches a command interpreter without being fully separated from the command itself, so an attacker can append instructions of their own. Because those run with the application's privileges, it frequently means control of the host. The lasting fix is to avoid constructing commands from input — call APIs directly and pass arguments as data, never as concatenated strings.

General guidance for the command injection class — the official description and references above are authoritative for this specific CVE. Want a bespoke review and a reviewed fix? Ask our team →

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Smart S85fApplication
Affected:<= 2023-08-07

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to a release after 2023-08-07
Recommended fix Moderate confidence
  1. Isolate the affected Byzoro Smart S85F Management Platform from untrusted networks using network segmentation or firewall rules
  2. If the /log/decodmail.php functionality is not essential, disable or remove the file entirely from the webroot
  3. Implement strict input validation and sanitization on any remaining web-facing interfaces
  4. Deploy Web Application Firewall (WAF) rules to detect and block command injection attempts
  5. Monitor network traffic and application logs for suspicious patterns matching CVE-2023-4414
  6. Consider compensating controls such as limiting PHP execution permissions on directories containing this file
  7. Audit all other web-facing endpoints on the Smart S85F platform for similar command injection vulnerabilities
Caveat No official fix available from Byzoro; vendor did not respond to disclosure

Generated from the published advisory — verify against the referenced sources before acting.

We can identify the exact fixed release, upgrade, and verify it in staging — typical engagement from $3,550. Get the upgrade done

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Free · runs locally
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2023-4414 in production — separate from our analysis above.

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What this is

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  • Version or environment caveats, and links to real fixes
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