What’s Vulnerable › Vulnerabilities

CVE-2020-27263

• Severity: critical (CVSS 9.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 5.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-01-14 · updated 2026-06-17
• Weakness: CWE-122

Description

KEPServerEX: v6.0 to v6.9, ThingWorx Kepware Server: v6.8 and v6.9, ThingWorx Industrial Connectivity: All versions, OPC-Aggregator: All versions, Rockwell Automation KEPServer Enterprise, GE Digital Industrial Gateway Server: v7.68.804 and v7.66, Software Toolbox TOP Server: All 6.x versions, are vulnerable to a heap-based buffer overflow. Opening a specifically crafted OPC UA message could allow an attacker to crash the server and potentially leak data.

Affected products

• GE Industrial Gateway Server: 7.66, 7.68.804
• PTC Kepware KEPServerEX: 6.0, 6.9
• PTC OPC-Aggregator: all versions
• PTC ThingWorx Industrial Connectivity: all versions
• PTC ThingWorx Kepware Server: 6.8, 6.9
• Rockwell Automation KEPServer Enterprise: 6.6.504.0, 6.9.572.0
• Softwaretoolbox Top Server: from 6.0 through 6.9

References

• https://us-cert.cisa.gov/ics/advisories/icsa-20-352-02
• https://us-cert.cisa.gov/ics/advisories/icsa-20-352-02

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