How severe is CVE-2023-5491?

CVE-2023-5491 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2023-5491 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-5491?

CVE-2023-5491 affects Byzoro Smart S45f Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-5491?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-5491 published?

CVE-2023-5491 was published on 2023-10-10 and last updated on 2026-06-17.

CVE-2023-5491

CVE-2023-5491 is a medium-severity vulnerability in Byzoro Smart S45f Firmware with a CVSS 3.x base score of 6.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-434.

Key facts

Severity: Medium (CVSS 3.x base score 6.3)
CVSS v2: 6.5
EPSS exploit prediction: 2% (75th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Byzoro Smart S45f Firmware
Published: 2023-10-10
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2023-5491?: 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.
How severe is CVE-2023-5491?: CVE-2023-5491 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2023-5491 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-5491?: CVE-2023-5491 affects Byzoro Smart S45f Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-5491?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-5491 published?: CVE-2023-5491 was published on 2023-10-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:byzoro:smart_s45f_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Byzoro Smart S45f Firmware

CVE-2023-5494 — Medium (CVSS 6.3): A vulnerability was found in Byzoro Smart S45F Multi-Service Secure Gateway Intelligent Management Platform up to…
CVE-2023-5493 — Medium (CVSS 6.3): A vulnerability has been found in Byzoro Smart S45F Multi-Service Secure Gateway Intelligent Management Platform up to…
CVE-2023-5492 — Medium (CVSS 6.3): A vulnerability, which was classified as critical, was found in Byzoro Smart S45F Multi-Service Secure Gateway…
CVE-2023-5490 — Medium (CVSS 6.3): A vulnerability classified as critical was found in Byzoro Smart S45F Multi-Service Secure Gateway Intelligent…
CVE-2023-5489 — Medium (CVSS 6.3): A vulnerability classified as critical has been found in Byzoro Smart S45F Multi-Service Secure Gateway Intelligent…
CVE-2023-5488 — Medium (CVSS 6.3): A vulnerability was found in Byzoro Smart S45F Multi-Service Secure Gateway Intelligent Management Platform up to…

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