How severe is CVE-2023-5402?

CVE-2023-5402 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-5402 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-5402?

CVE-2023-5402 affects Schneider-electric C-bus Toolkit. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-5402?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2023-5402 published?

CVE-2023-5402 was published on 2023-10-04 and last updated on 2026-06-17.

CVE-2023-5402

CVE-2023-5402 is a critical-severity vulnerability in Schneider-electric C-bus Toolkit with a CVSS 3.x base score of 9.8. 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-269.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (47th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-269
Affected product: Schneider-electric C-bus Toolkit
Published: 2023-10-04
Last modified: 2026-06-17

Description

A CWE-269: Improper Privilege Management vulnerability exists that could cause a remote code execution when the transfer command is used over the network.

Frequently asked questions

What is CVE-2023-5402?: A CWE-269: Improper Privilege Management vulnerability exists that could cause a remote code execution when the transfer command is used over the network.
How severe is CVE-2023-5402?: CVE-2023-5402 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-5402 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-5402?: CVE-2023-5402 affects Schneider-electric C-bus Toolkit. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-5402?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2023-5402 published?: CVE-2023-5402 was published on 2023-10-04 and last updated on 2026-06-17.

References

https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2023-283-01&p_enDocType=Security+and+Safety+Notice&p_File_Name=SEVD-2023-283-01.pdf

Affected products (1)

cpe:2.3:a:schneider-electric:c-bus_toolkit:*:*:*:*:*:*:*:*

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