Stack-based buffer overflow in PTC Kepware KEPServerEX; ThingWorx Industrial…
Priority MEDIUM 56CWE-121Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.
Summary
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 stack-based buffer overflow. Opening a specifically crafted OPC UA message could allow an attacker to crash the server and remotely execute code.
Why it matters now
EPSS 0.12504 96th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | PTC Kepware KEPServerEX; ThingWorx Industrial Connectivity; OPC-Aggregator; Rockwell Automation KEPServer Enterprise; GE Digital Industrial Gateway Server; Software Toolbox TOP Server | v6.0 to v6.9; v6.8 and v6.9; All versions; v7.68.804, v7.66; All 6.x versions | — | No fix listed | CNA |
- PTC Kepware KEPServerEX; ThingWorx Industrial Connectivity; OPC-Aggregator; Rockwell Automation KEPServer Enterprise; GE Digital Industrial Gateway Server; Software Toolbox TOP Server Vendor— Affected v6.0 to v6.9; v6.8 and v6.9; All versions; v7.68.804, v7.66; All 6.x versions Fixed in — No fix listed CNA
CPE configurations NVD · 11
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:ge:industrial_gateway_server:7.66:*:*:*:*:*:*:* | 7.66 | Vulnerable | GE |
| cpe:2.3:a:ge:industrial_gateway_server:7.68.804:*:*:*:*:*:*:* | 7.68.804 | Vulnerable | GE |
| cpe:2.3:a:ptc:kepware_kepserverex:6.0:*:*:*:*:*:*:* | 6.0 | Vulnerable | PTC |
| cpe:2.3:a:ptc:kepware_kepserverex:6.9:*:*:*:*:*:*:* | 6.9 | Vulnerable | PTC |
| cpe:2.3:a:ptc:opc-aggregator:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | PTC |
| cpe:2.3:a:ptc:thingworx_industrial_connectivity:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | PTC |
| cpe:2.3:a:ptc:thingworx_kepware_server:6.8:*:*:*:*:*:*:* | 6.8 | Vulnerable | PTC |
| cpe:2.3:a:ptc:thingworx_kepware_server:6.9:*:*:*:*:*:*:* | 6.9 | Vulnerable | PTC |
| cpe:2.3:a:rockwellautomation:kepserver_enterprise:6.6.504.0:*:*:*:*:*:*:* | 6.6.504.0 | Vulnerable | Rockwell |
| cpe:2.3:a:rockwellautomation:kepserver_enterprise:6.9.572.0:*:*:*:*:*:*:* | 6.9.572.0 | Vulnerable | Rockwell |
- cpe:2.3:a:ge:industrial_gateway_server:7.66:*:*:*:*:*:*:* Versions 7.66 Vulnerable ·GE
- cpe:2.3:a:ge:industrial_gateway_server:7.68.804:*:*:*:*:*:*:* Versions 7.68.804 Vulnerable ·GE
- cpe:2.3:a:ptc:kepware_kepserverex:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·PTC
- cpe:2.3:a:ptc:kepware_kepserverex:6.9:*:*:*:*:*:*:* Versions 6.9 Vulnerable ·PTC
- cpe:2.3:a:ptc:opc-aggregator:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·PTC
- cpe:2.3:a:ptc:thingworx_industrial_connectivity:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·PTC
- cpe:2.3:a:ptc:thingworx_kepware_server:6.8:*:*:*:*:*:*:* Versions 6.8 Vulnerable ·PTC
- cpe:2.3:a:ptc:thingworx_kepware_server:6.9:*:*:*:*:*:*:* Versions 6.9 Vulnerable ·PTC
- cpe:2.3:a:rockwellautomation:kepserver_enterprise:6.6.504.0:*:*:*:*:*:*:* Versions 6.6.504.0 Vulnerable ·Rockwell
- cpe:2.3:a:rockwellautomation:kepserver_enterprise:6.9.572.0:*:*:*:*:*:*:* Versions 6.9.572.0 Vulnerable ·Rockwell
Show 1 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:softwaretoolbox:top_server:*:*:*:*:*:*:*:* | 6.0 – 6.9 | Vulnerable | Software Toolbox |
- cpe:2.3:a:softwaretoolbox:top_server:*:*:*:*:*:*:*:* Versions 6.0 – 6.9 Vulnerable ·Software Toolbox
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-27265
- 2026-10-03 Alias added: GHSA-355x-g6q7-4c7g
References
Sources
- CVE-2020-27265 · CVE Program
- CVE-2020-27265 · NVD
- FIRST EPSS
- GHSA-355x-g6q7-4c7g · GitHub Advisory Database · CC BY 4.0
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