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CVE-2021-4181Crash 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…
- 7.5HighCVSS base score
- 4.1%Exploitation in 30 daysEPSS · top 9.2% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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
Timeline
ID reserved
By GitLab
- 3 days later
· 3 days later
Published
- 4 years later
· 4 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitLabCNA (assigner) | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 4.1% · top 9.2% of all CVEs (13 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Affected products
Wireshark Foundation · Wireshark
- affected =3.6.0
- affected >=3.4.0, <3.4.10
References
References9
- https://www.wireshark.org/security/wnpa-sec-2021-21.html (opens in a new tab)x_transferred
- https://gitlab.com/wireshark/wireshark/-/merge_requests/5429 (opens in a new tab)x_transferred
- https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-4181.json (opens in a new tab)x_transferred
- FEDORA-2022-1daf93c51d (opens in a new tab)vendor-advisoryx_transferred
- FEDORA-2022-30411cb3c4 (opens in a new tab)vendor-advisoryx_transferred
- [debian-lts-announce] 20220331 [SECURITY] [DLA 2967-1] wireshark security update (opens in a new tab)mailing-listx_transferred
- https://www.oracle.com/security-alerts/cpuapr2022.html (opens in a new tab)x_transferred
- GLSA-202210-04 (opens in a new tab)vendor-advisoryx_transferred
- https://lists.debian.org/debian-lts-announce/2024/09/msg00049.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2021-34041 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2021-4181)Record last updated .