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CVE-2021-4181

27
FAUCET Score

CVE-2021-4181 is a denial-of-service vulnerability affecting Wireshark versions 3.6.0 and 3.4.0 through 3.4.10, specifically within the Sysdig Event dissector. An unauthenticated attacker can trigger a crash by injecting malicious packets or providing a crafted capture file. Rated 7.5 HIGH, this vulnerability has a low attack complexity and can lead to a complete denial of service for affected Wireshark instances. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 3.4.0, < 3.4.11CPE matchmatch criteria
cpe:2.3:a:wireshark:wireshark:*:*:*:*:*:*:*:*
3.6.0CPE matchmatch criteria
cpe:2.3:a:wireshark:wireshark:3.6.0:*:*:*:*:*:*:*
34CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
35CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.77%
Probability of exploitation in next 30 days
EPSS Percentile
88.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0377 is in the 80th percentile among its peer group of 51,553 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

microsoftpatch availablevia msrc
Product: 19467-16823Fixed in: 3.4.14-1
microsoftpatch availablevia msrc
Product: cbl2 wireshark 3.4.14-1 on CBL Mariner 2.0Fixed in: 3.4.14-1
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 x64Fixed in: 3.4.14-1
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 ARMFixed in: 3.4.14-1
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: wireshark

Vendor Advisories (3)

microsoft2022-Jan/CVE-2021-4181

CVE-2021-4181

Jan 11, 2022
redhatCVE-2021-4181Moderate

wireshark: Sysdig Event dissector crash

Dec 29, 2021
microsoft2021-Dec/CVE-2021-4181Important

Crash in the Sysdig Event dissector in Wireshark 3.6.0 and 3.4.0 to 3.4.10 allows denial of service via packet injection or crafted capture file

Dec 14, 2021

References

lists.debian.org / debian-lts-announce/2024/09/msg00049.html
gitlab.com / gitlab-org/cves/-/blob/master/2021/CVE-2021-4181.json
Third Party Advisory
gitlab.com / wireshark/wireshark/-/merge_requests/5429
ExploitIssue TrackingThird Party Advisory
lists.debian.org / debian-lts-announce/2022/03/msg00041.html
Mailing ListThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/Q6XGBKWSQFCVYUN4ZK3O3NJIFP3OAFVT
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/R5AEK3XTOIOGCGUILUFISMGX54YJXWGJ
security.gentoo.org / glsa/202210-04
Third Party Advisory
oracle.com / security-alerts/cpuapr2022.html
Third Party Advisory
wireshark.org / security/wnpa-sec-2021-21.html
Vendor Advisory