CVE-2020-27263
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, 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-122
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.