CVE-2020-27263
9.1
CRITICAL · CVSS 3.1 · EPSS 4.9% (pctl 92)
In your normal cycle
Critical by CVSS (9.1), but no sign of active exploitation.
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.
Scoring
| CVSS | 9.1 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
| EPSS | 4.94% — more likely to be exploited than 92% of all CVEs |
| Weakness | CWE-122 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2021-01-14 |
| Last modified | 2026-06-17 |
Affected (7)
| Vendor | Product |
|---|---|
| ge | industrial gateway server |
| ptc | kepware kepserverex |
| ptc | opc-aggregator |
| ptc | thingworx industrial connectivity |
| ptc | thingworx kepware server |
| rockwellautomation | kepserver enterprise |
| softwaretoolbox | top server |
References
→ the Explorer · watch your stack · NVD