What’s Vulnerable › Vulnerabilities

CVE-2023-5909: Improper Validation of Certificate with Host Mismatch in PTC KEPServerEx

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-11-30 · updated 2026-06-17
• Weakness: CWE-297

Description

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

Affected products

• GE Industrial Gateway Server: through 7.614
• PTC Keepserverex: through 6.14.263.0
• PTC OPC-Aggregator: through 6.14
• PTC ThingWorx Industrial Connectivity: all versions
• PTC ThingWorx Kepware Edge: through 1.7
• PTC ThingWorx Kepware Server: through 6.14.263.0
• Rockwell Automation KEPServer Enterprise: through 6.14.263.0
• Softwaretoolbox Top Server: through 6.14.263.0

References

• https://www.cisa.gov/news-events/ics-advisories/icsa-23-334-03
• https://www.cisa.gov/news-events/ics-advisories/icsa-23-334-03

Get alerted when CVE-2023-5909 or the next vulnerability affects your stack