Use after free in PTC Kepware KEPServerEX
Priority MEDIUM 48CWE-416Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
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, 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.
Why it matters now
EPSS 0.05986 93rd 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 | v6.0 to v6.9 | — | No fix listed | CNA |
| — | ThingWorx Kepware Server | v6.8 and v6.9 | — | No fix listed | CNA |
| — | ThingWorx Industrial Connectivity | All versions | — | No fix listed | CNA |
| — | OPC-Aggregator | All versions | — | No fix listed | CNA |
| — | Rockwell Automation KEPServer Enterprise | All versions | — | No fix listed | CNA |
| — | GE Digital Industrial Gateway Server | v7.68.804; v7.66 | — | No fix listed | CNA |
| — | Software Toolbox TOP Server | All 6.x versions | — | No fix listed | CNA |
- PTC Kepware KEPServerEX Vendor— Affected v6.0 to v6.9 Fixed in — No fix listed CNA
- ThingWorx Kepware Server Vendor— Affected v6.8 and v6.9 Fixed in — No fix listed CNA
- ThingWorx Industrial Connectivity Vendor— Affected All versions Fixed in — No fix listed CNA
- OPC-Aggregator Vendor— Affected All versions Fixed in — No fix listed CNA
- Rockwell Automation KEPServer Enterprise Vendor— Affected All versions Fixed in — No fix listed CNA
- GE Digital Industrial Gateway Server Vendor— Affected v7.68.804; v7.66 Fixed in — No fix listed CNA
- Software Toolbox TOP Server Vendor— Affected 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-2020-27267
- 2026-10-03 Alias added: GHSA-mr5h-jvqg-8jg8
References
Sources
- CVE-2020-27267 · CVE Program
- CVE-2020-27267 · NVD
- FIRST EPSS
- GHSA-mr5h-jvqg-8jg8 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences