VULNERABILITY INTELLIGENCE

CVE-2021-39921

CVSS score7.5 HIGH

EPSS probability3.37%

CISA KEVNot currently listed

Published2021-11-19

Last modified2026-06-17

Description

NULL pointer exception in the Modbus dissector in Wireshark 3.4.0 to 3.4.9 and 3.2.0 to 3.2.17 allows denial of service via packet injection or crafted capture file