CVE-2021-20986: Hilscher Profinet Io Device Firmware

High severity, CVSS 7.5. EPSS: 1% chance of exploitation in the next 30 days.

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.

Affected products

  • Hilscher Profinet Io Device Firmware: from 3.0, before 3.14.0.7 (fixed in 3.14.0.7)
  • Pepperl-Fuchs Ohv-f230-b17 Firmware: up to and including 1.1.0
  • Pepperl-Fuchs OIT500-f113b17-Cb Firmware: up to and including 1.3.4
  • Pepperl-Fuchs PCV100-f200-b17-v1d-6011-6997 Firmware: up to and including 3.2.3
  • Pepperl-Fuchs PCV100-f200-b17-v1d-6011-8203 Firmware: up to and including 3.2.5
  • Pepperl-Fuchs PCV100-f200-b17-v1d-6011 Firmware: up to and including 3.2.5
  • Pepperl-Fuchs PCV100-f200-b17-v1d Firmware: up to and including 3.2.3
  • Pepperl-Fuchs PCV50-f200-b17-v1d Firmware: up to and including 3.2.3
  • Pepperl-Fuchs PCV80-f200-b17-v1d Firmware: up to and including 3.2.3
  • Pepperl-Fuchs PGV100-f200-b17-v1d-7477 Firmware: up to and including 2.0.0
  • Pepperl-Fuchs PGV100-f200a-b17-v1d Firmware: up to and including 2.0.0
  • Pepperl-Fuchs PGV100A-f200-b28-v1d Firmware: up to and including 1.0.3
  • Pepperl-Fuchs PGV100A-f200a-b28-v1d Firmware: up to and including 1.0.3
  • Pepperl-Fuchs PGV100AQ-f200-b28-v1d Firmware: up to and including 2.1.1
  • Pepperl-Fuchs PGV100AQ-f200a-b28-v1d Firmware: up to and including 2.1.1
  • Pepperl-Fuchs PGV150I-f200a-b17-v1d Firmware: up to and including 2.0.0
  • Pepperl-Fuchs Pha Firmware: up to and including 3.1.5
  • Pepperl-Fuchs PXV100-f200-b17-v1d-3636 Firmware: up to and including 4.2.0
  • Pepperl-Fuchs PXV100-f200-b17-v1d Firmware: up to and including 4.2.0
  • Pepperl-Fuchs PXV100A-f200-b28-v1d-6011 Firmware: up to and including 1.0.3
  • Pepperl-Fuchs PXV100A-f200-b28-v1d Firmware: up to and including 1.0.3
  • Pepperl-Fuchs PXV100AQ-f200-b28-v1d-6011 Firmware: up to and including 2.1.1
  • Pepperl-Fuchs PXV100AQ-f200-b28-v1d Firmware: up to and including 2.1.1
  • Pepperl-Fuchs Wcs Firmware: up to and including 3.0.0

Published 2021-02-16. Last modified 2026-06-17.