{"id":"CVE-2021-34594","aliases":["EUVD-2021-21244","GHSA-pjgx-r654-8vfq"],"status":"published","title":"Beckhoff: Relative path traversal vulnerability through TwinCAT OPC UA Server","description":"TwinCAT OPC UA Server in TF6100 and TS6100 in product versions before 4.3.48.0 or with TcOpcUaServer versions below 3.2.0.194 are prone to a relative path traversal that allow administrators to create or delete any files on the system.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.01126,"percentile":0.66775,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-22","CWE-23"],"published":"2021-11-04T09:50:09Z","modified":"2026-06-17T03:56:12Z","products":[{"vendor":"beckhoff","product":"tf6100_firmware"},{"vendor":"beckhoff","product":"ts6100_firmware"},{"vendor":"beckhoff automation","product":"twincat opc ua server"}],"references":[{"url":"https://cert.vde.com/en/advisories/VDE-2021-051/","tags":["x_refsource_CONFIRM","x_transferred","Mitigation","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-34594"},{"url":"https://github.com/advisories/GHSA-pjgx-r654-8vfq"}],"sources":{"cve":[{"id":"CVE-2021-34594","title":"Beckhoff: Relative path traversal vulnerability through TwinCAT OPC UA Server","description":"TwinCAT OPC UA Server in TF6100 and TS6100 in product versions before 4.3.48.0 or with TcOpcUaServer versions below 3.2.0.194 are prone to a relative path traversal that allow administrators to create or delete any files on the system.","status":"published","published":"2021-11-04T09:50:09.275Z","modified":"2024-09-16T22:03:44.063Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-23"],"updated_at":"2026-11-02T14:33:11.244759Z"}],"euvd":[{"id":"EUVD-2021-21244","description":"TwinCAT OPC UA Server in TF6100 and TS6100 in product versions before 4.3.48.0 or with TcOpcUaServer versions below 3.2.0.194 are prone to a relative path traversal that allow administrators to create or delete any files on the system.","status":"published","published":"2021-11-04T09:50:09Z","modified":"2024-09-16T22:03:44Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H","level":"medium"}],"updated_at":"2026-11-03T00:55:05.688542Z"}],"ghsa":[{"id":"GHSA-pjgx-r654-8vfq","title":"TwinCAT OPC UA Server in TF6100 and TS6100 in product versions before 4.3.48.0 or with...","description":"TwinCAT OPC UA Server in TF6100 and TS6100 in product versions before 4.3.48.0 or with TcOpcUaServer versions below 3.2.0.194 are prone to a relative path traversal that allow administrators to create or delete any files on the system.","status":"published","published":"2022-05-24T19:19:47Z","modified":"2023-01-30T05:03:35Z","cwes":["CWE-22"],"updated_at":"2026-11-02T14:46:51.868413Z"}],"nvd":[{"id":"CVE-2021-34594","description":"TwinCAT OPC UA Server in TF6100 and TS6100 in product versions before 4.3.48.0 or with TcOpcUaServer versions below 3.2.0.194 are prone to a relative path traversal that allow administrators to create or delete any files on the system.","status":"published","published":"2021-11-04T10:15:07.833Z","modified":"2026-06-17T03:56:12.117Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H","level":"medium","assessor":"secondary"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":8.5,"vector":"AV:N/AC:L/Au:S/C:N/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-23","CWE-22"],"updated_at":"2026-11-02T14:07:00.549994Z"}]}}