CVE-2021-4186
CVSS v3
7.5
HIGH
EPSS Score
2.1 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
Crash in the Gryphon dissector in Wireshark 3.4.0 to 3.4.10 allows denial of service via packet injection or crafted capture file
Technical details
- Published
- 2021-12-30
Frequently asked questions
What is CVE-2021-4186?
Crash in the Gryphon dissector in Wireshark 3.4.0 to 3.4.10 allows denial of service via packet injection or crafted capture file
Is CVE-2021-4186 actively exploited?
Active exploitation of CVE-2021-4186 has not been confirmed. Its EPSS score was 2.1% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2021-4186?
CVE-2021-4186 has a CVSS v3 base score of 7.5 (HIGH severity).
Is CVE-2021-4186 affecting your environment?
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