CVE-2023-5488Public exploitNetwork attack vector

Authenticated remote code execution via unrestricted file upload

Published Oct 10, 2023 · Updated Aug 2, 2024

Unrestricted file upload in Byzoro Smart S45F up to 20230928 allows remote authenticated users to execute code via HTTPS. The /sysmanage/updatelib.php handler accepts the file_upload multipart field and stores a PHP file that remains web-accessible, without restricting dangerous types. Exploitation requires access to the management interface and can grant server-level control of the gateway.

CVSS severity8.8
High
EPSS probability1.85%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in Byzoro Smart S45F up to 20230928 allows remote authenticated users to execute code via HTTPS. The /sysmanage/updatelib.php handler accepts the file_upload multipart field and stores a PHP file that remains web-accessible, without restricting dangerous types. Exploitation requires access to the management interface and can grant server-level control of the gateway.

The record

CVE
CVE-2023-5488
Published
Oct 10, 2023
Updated
Aug 2, 2024
Vendor
Byzoro
Product
Smart S45F
Classifications
CWE-434, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 10, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=20230928

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Byzoro · Smart S45Fversion=20230928

Published CVSS scores

6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P
8.8NISTCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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