CVE-2021-4186

6.3 MEDIUM
Published: December 30, 2021 Modified: November 03, 2025
View on NVD

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

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

Login to generate AI explanation

CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-4186.json
Source: cve@gitlab.com
Third Party Advisory
https://gitlab.com/wireshark/wireshark/-/issues/17737
Source: cve@gitlab.com
Exploit Issue Tracking Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2EY2VFBU3YGGWI5BW4XKT3F37MYGEQUD/
Source: cve@gitlab.com
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3FH2J57GDA2WMBS6J56F6QQRA6BXQQFZ/
Source: cve@gitlab.com
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Q6XGBKWSQFCVYUN4ZK3O3NJIFP3OAFVT/
Source: cve@gitlab.com
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R5AEK3XTOIOGCGUILUFISMGX54YJXWGJ/
Source: cve@gitlab.com
https://security.gentoo.org/glsa/202210-04
Source: cve@gitlab.com
Third Party Advisory
https://www.wireshark.org/security/wnpa-sec-2021-16.html
Source: cve@gitlab.com
Vendor Advisory
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-4186.json
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://gitlab.com/wireshark/wireshark/-/issues/17737
Source: af854a3a-2127-422b-91ae-364da2661108
Exploit Issue Tracking Third Party Advisory
https://lists.debian.org/debian-lts-announce/2024/09/msg00049.html
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2EY2VFBU3YGGWI5BW4XKT3F37MYGEQUD/
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3FH2J57GDA2WMBS6J56F6QQRA6BXQQFZ/
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Q6XGBKWSQFCVYUN4ZK3O3NJIFP3OAFVT/
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R5AEK3XTOIOGCGUILUFISMGX54YJXWGJ/
Source: af854a3a-2127-422b-91ae-364da2661108
https://security.gentoo.org/glsa/202210-04
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://www.wireshark.org/security/wnpa-sec-2021-16.html
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory

17 reference(s) from NVD

Quick Stats

CVSS v3 Score
6.3 / 10.0
EPSS (Exploit Probability)
0.1%
33th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

CWE-476

Affected Vendors

wireshark fedoraproject

Related CVEs

CVE-2025-52691 10.0
CVE-2025-15168 7.3
CVE-2025-15167 7.3
CVE-2025-15166 7.3
CVE-2025-15165 7.3