CVE-2023-5909 - CVE House
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Status published High CVE-2023-5909

Improper Validation of Certificate with Host Mismatch in PTC KEPServerEx

Vulnerability Description

KEPServerEX does not properly validate certificates from clients which may allow unauthenticated users to connect.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Shawn Hoffman

References

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Affected Vendor

Affected Software

KEPServerEX, ThingWorx Kepware Server, ThingWorx Industrial Connectivity, OPC-Aggregator, ThingWorx Kepware Edge, KEPServer Enterprise, Industrial Gateway Server, TOP Server
Vulnerable Versions:
0, All versions

Timeline

Official Publish: November 30th, 2023
Last Modified: February 25th, 2026
Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Weaknesses (CWE)

CWE-297

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.