How severe is CVE-2023-5399?

CVE-2023-5399 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-2023-5399 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 39% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-5399?

CVE-2023-5399 affects Schneider-electric Spacelogic C-bus Toolkit. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-5399?

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-2023-5399 published?

CVE-2023-5399 was published on 2023-10-04 and last updated on 2026-06-17.

CVE-2023-5399

CVE-2023-5399 is a critical-severity vulnerability in Schneider-electric Spacelogic C-bus Toolkit with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 39% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-22.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 39% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Schneider-electric Spacelogic C-bus Toolkit
Published: 2023-10-04
Last modified: 2026-06-17

Description

A CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability exists that could cause tampering of files on the personal computer running C-Bus when using the File Command.

Frequently asked questions

What is CVE-2023-5399?: A CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability exists that could cause tampering of files on the personal computer running C-Bus when using the File Command.
How severe is CVE-2023-5399?: CVE-2023-5399 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-2023-5399 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 39% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-5399?: CVE-2023-5399 affects Schneider-electric Spacelogic C-bus Toolkit. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-5399?: 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-2023-5399 published?: CVE-2023-5399 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:spacelogic_c-bus_toolkit:*:*:*:*:*:*:*:*

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