{"id":"CVE-2020-27263","aliases":["EUVD-2020-19776","GHSA-66v8-hp22-2q37"],"status":"published","title":"KEPServerEX: v6.0 to v6.9, ThingWorx Kepware Server: v6.8 and v6.9, ThingWorx Industrial...","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.","severity":{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.05986,"percentile":0.93403,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-122","CWE-787"],"published":"2021-01-13T23:30:08Z","modified":"2026-06-17T03:09:04Z","products":[{"vendor":"ge","product":"industrial_gateway_server"},{"vendor":"ptc","product":"ge digital industrial gateway server"},{"vendor":"ptc","product":"kepware_kepserverex"},{"vendor":"ptc","product":"opc-aggregator"},{"vendor":"ptc","product":"ptc kepware kepserverex"},{"vendor":"ptc","product":"rockwell automation kepserver enterprise"},{"vendor":"ptc","product":"thingworx industrial connectivity"},{"vendor":"ptc","product":"thingworx kepware server"},{"vendor":"ptc","product":"thingworx_industrial_connectivity"},{"vendor":"ptc","product":"thingworx_kepware_server"},{"vendor":"rockwellautomation","product":"kepserver_enterprise"},{"vendor":"software toolbox","product":"software toolbox top server"},{"vendor":"softwaretoolbox","product":"top_server"}],"references":[{"url":"https://us-cert.cisa.gov/ics/advisories/icsa-20-352-02","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-27263"},{"url":"https://github.com/advisories/GHSA-66v8-hp22-2q37"}],"sources":{"cve":[{"id":"CVE-2020-27263","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.","status":"published","published":"2021-01-13T23:30:08Z","modified":"2024-08-04T16:11:36.407Z","cwes":["CWE-122"],"updated_at":"2026-11-02T14:35:53.552996Z"}],"euvd":[{"id":"EUVD-2020-19776","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.","status":"published","published":"2021-01-13T23:30:08Z","modified":"2024-08-04T16:11:36Z","updated_at":"2026-11-03T03:07:12.940476Z"}],"ghsa":[{"id":"GHSA-66v8-hp22-2q37","title":"KEPServerEX: v6.0 to v6.9, ThingWorx Kepware Server: v6.8 and v6.9, ThingWorx Industrial...","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.","status":"published","published":"2022-05-24T17:39:17Z","modified":"2023-01-29T05:05:24Z","cwes":["CWE-787"],"updated_at":"2026-11-02T14:45:46.865713Z"}],"nvd":[{"id":"CVE-2020-27263","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.","status":"published","published":"2021-01-14T00:15:13.353Z","modified":"2026-06-17T03:09:04.717Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":6.4,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-122","CWE-787"],"updated_at":"2026-11-02T14:06:28.892872Z"}]}}