{"cve":"CVE-2021-20986","nvd":{"published":"2021-02-16T17:15:12.817","modified":"2026-06-17T03:34:36.007","status":"Modified","description":"A Denial of Service vulnerability was found in Hilscher PROFINET IO Device V3 in versions prior to V3.14.0.7. This may lead to unexpected loss of cyclic communication or interruption of acyclic communication.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-787"],"references":["https://cert.vde.com/en-us/advisories/vde-2021-006","https://kb.hilscher.com/display/ISMS/2020-12-03+Denial+of+Service+vulnerability+in+PROFINET+IO+Device","https://cert.vde.com/en-us/advisories/vde-2021-006","https://kb.hilscher.com/display/ISMS/2020-12-03+Denial+of+Service+vulnerability+in+PROFINET+IO+Device"],"products":["hilscher:profinet_io_device_firmware","pepperl-fuchs:ohv-f230-b17_firmware","pepperl-fuchs:oit500-f113b17-cb_firmware","pepperl-fuchs:pcv100-f200-b17-v1d-6011-6997_firmware","pepperl-fuchs:pcv100-f200-b17-v1d-6011-8203_firmware","pepperl-fuchs:pcv100-f200-b17-v1d-6011_firmware","pepperl-fuchs:pcv100-f200-b17-v1d_firmware","pepperl-fuchs:pcv50-f200-b17-v1d_firmware","pepperl-fuchs:pcv80-f200-b17-v1d_firmware","pepperl-fuchs:pgv100-f200-b17-v1d-7477_firmware","pepperl-fuchs:pgv100-f200a-b17-v1d_firmware","pepperl-fuchs:pgv100a-f200-b28-v1d_firmware","pepperl-fuchs:pgv100a-f200a-b28-v1d_firmware","pepperl-fuchs:pgv100aq-f200-b28-v1d_firmware","pepperl-fuchs:pgv100aq-f200a-b28-v1d_firmware","pepperl-fuchs:pgv150i-f200a-b17-v1d_firmware","pepperl-fuchs:pha_firmware","pepperl-fuchs:pxv100-f200-b17-v1d-3636_firmware","pepperl-fuchs:pxv100-f200-b17-v1d_firmware","pepperl-fuchs:pxv100a-f200-b28-v1d-6011_firmware","pepperl-fuchs:pxv100a-f200-b28-v1d_firmware","pepperl-fuchs:pxv100aq-f200-b28-v1d-6011_firmware","pepperl-fuchs:pxv100aq-f200-b28-v1d_firmware","pepperl-fuchs:wcs_firmware"],"source":"nvd","synced_at":"2026-10-19T21:15:50.279857260+00:00"},"epss":{"cve":"CVE-2021-20986","score":0.01038,"percentile":0.63957,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}