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CVE-2021-4183Crash in the pcapng file parser in Wireshark 3.6.0 allows denial of service via crafted capture file
- 5.5MediumCVSS base score
- 1.5%Exploitation in 30 daysEPSS · top 25% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
Crash in the pcapng file parser in Wireshark 3.6.0 allows denial of service via crafted capture file
Timeline
ID reserved
By GitLab
- 3 days later
· 3 days later
Published
- 3 years later
· 3 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 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 1.5% · top 25% 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: Medium 5.5.
Affected products
Wireshark Foundation · Wireshark
- affected =3.6.0
References
References7
- https://www.wireshark.org/security/wnpa-sec-2021-19.html (opens in a new tab)x_transferred
- https://gitlab.com/wireshark/wireshark/-/issues/17755 (opens in a new tab)x_transferred
- https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-4183.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
- 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
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-2021-34043 (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-2021-4183)Record last updated .