CVE-2021-4186
MediumPublic PoC
Published: 30 December 2021
Published
30 December 2021
Modified
03 November 2025
KEV Added
—
Patch
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CVSS Score v3.1
6.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
EPSS Score
0.0013
31.7th percentile
Risk Priority
13
60% EPSS · 20% KEV · 20% CVSS
Summary
CVE-2021-4186 is a medium-severity NULL Pointer Dereference (CWE-476) vulnerability in Fedoraproject Fedora. Its CVSS base score is 6.3 (Medium).
Operationally, ranked at the 31.7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2021-34046
Vulnerability details
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
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
wireshark
wireshark
3.4.0 — 3.4.10
fedoraproject
fedora
34, 35
Mitigating Controls
No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.