CVE-2023-5491

Name: CVE-2023-5491
Creator: NVD / NIST
Published: 2023-10-10T15:15:11.003+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 1.72%

Last modified Jun 17, 2026

CVE-2023-5491 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. A vulnerability, which was classified as critical, has been found in Byzoro Smart S45F Multi-Service Secure Gateway Intelligent Management Platform up to 20230928. This issue affects some unknown processing of the file /sysmanage/updatelib.php. EPSS estimates a 1.72% chance of exploitation in the next 30 days.

Description

A vulnerability, which was classified as critical, has been found in Byzoro Smart S45F Multi-Service Secure Gateway Intelligent Management Platform up to 20230928. This issue affects some unknown processing of the file /sysmanage/updatelib.php. The manipulation of the argument file_upload leads to unrestricted upload. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. The associated identifier of this vulnerability is VDB-241643. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

1.72%

74.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-434

Affected Software

Vendor	Product	Versions
Byzoro	Smart S45f Firmware	<= 20230928

References

https://github.com/llixixi/cve/blob/main/s45_upload_changelogo.mdExploit, Third Party Advisory
https://vuldb.com/?ctiid.241643Permissions Required, Third Party Advisory
https://vuldb.com/?id.241643Third Party Advisory
https://vuldb.com/?submit.213948
https://github.com/llixixi/cve/blob/main/s45_upload_changelogo.mdExploit, Third Party Advisory
https://vuldb.com/?ctiid.241643Permissions Required, Third Party Advisory
https://vuldb.com/?id.241643Third Party Advisory
https://vuldb.com/?submit.213948

Timeline

Published: Oct 10, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-5491?

How severe is CVE-2023-5491?

CVE-2023-5491 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 1.72% probability of exploitation in the next 30 days.

How do I fix CVE-2023-5491?

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-2023-5491?

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

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Source: NVD / NIST