CVE-2020-27267
CRITICAL EPSS 91.1%
Published Jan 14, 20215y ago · Modified Jun 17, 20262w ago
9.1 CVSS 3.1
Published Jan 14, 2021 5y ago
Last Modified Jun 17, 2026 2w ago
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, and 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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity None
Availability High
Threat Intelligence
EPSS Exploit Probability
91.1% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 2
CWE-416 Use After Free Memory Safety
CWE-787 Out-of-bounds Write Memory Safety
Affected Products 11
| Vendor | Product | Version | Range |
|---|---|---|---|
| ge | industrial_gateway_server | 7.66 | any |
| ge | industrial_gateway_server | 7.68.804 | any |
| ptc | kepware_kepserverex | 6.0 | any |
| ptc | kepware_kepserverex | 6.9 | any |
| ptc | opc-aggregator | * | any |
| ptc | thingworx_industrial_connectivity | * | any |
| ptc | thingworx_kepware_server | 6.8 | any |
| ptc | thingworx_kepware_server | 6.9 | any |
| rockwellautomation | kepserver_enterprise | 6.6.504.0 | any |
| rockwellautomation | kepserver_enterprise | 6.9.572.0 | any |
| softwaretoolbox | top_server | * | ≥6.0 – ≤6.9 |
References 1
- us-cert.cisa.gov https://us-cert.cisa.gov/ics/advisories/icsa-20-352-02
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.