CVE-2021-39921

PoC —

CVSS 3.1

7.5 high

EPSS

3%p88

Published

Nov 19, 2021 (Nov 19, 2021)

Modified

Jun 17, 2026

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

Vendors: wireshark fedoraproject debian
Products: wireshark, fedora, debian linux
Weakness: CWE-476
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD CVE.org GitHub PoCs EPSS (3.4%)

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