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No exploitation reportedFix available

CVE-2021-22235

No exploitation reported by the sources we read.

  • Published2021-07-20
  • Fixed in3.4.7 · 3.2.15
  • WeaknessCWE-835

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Crash in DNP dissector in Wireshark 3.4.0 to 3.4.6 and 3.2.0 to 3.2.14 allows denial of service via packet injection or crafted capture file

Timeline

dates in UTC
  1. 2021-07-2012:15CVE publishedNVD

Versions per branch

NVD
Wireshark
BranchAffectedFixed in
3.4≥ 3.4.0, < 3.4.73.4.7
3.2≥ 3.2.0, < 3.2.153.2.15
Debian debian linux
BranchAffectedFixed in
9.0= 9.0no fix published
10.0= 10.0no fix published
11.0= 11.0no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • wiresharkUbuntu:Pro:22.04:LTSall versions · no fixed version listed
  • wiresharkUbuntu:Pro:20.04:LTSall versions · no fixed version listed
  • wiresharkUbuntu:Pro:18.04:LTSall versions · no fixed version listed
  • wiresharkUbuntu:Pro:16.04:LTSall versions · no fixed version listed
  • wiresharkUbuntu:Pro:14.04:LTSall versions · no fixed version listed
  • wiresharkUbuntu:26.10all versions · no fixed version listed
  • wiresharkUbuntu:26.04:LTSall versions · no fixed version listed
  • wiresharkUbuntu:25.10all versions · no fixed version listed

27 more package ranges on OSV.dev

Vendor advisories

Full record on NVD

Fix

  1. Update Wireshark to 3.4.7 · 3.2.15

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • CNACVSS 3.17.5known since 2026-10-23
  • NVDCVSS 3.17.5read 2026-10-23
  • NVDCVSS 2.05read 2026-10-23
  • NVDweakness (CWE)CWE-835read 2026-10-23
  • FIRST EPSSEPSS score3.4 %2026-11-08
  • OSVaffected packages—
  • GitHub Advisoriesadvisory—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2021-07-20
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-c9h4-m6h9-v7wx

Frequently asked questions

What is CVE-2021-22235?

Crash in DNP dissector in Wireshark 3.4.0 to 3.4.6 and 3.2.0 to 3.2.14 allows denial of service via packet injection or crafted capture file

Is CVE-2021-22235 actively exploited?

Active exploitation of CVE-2021-22235 has not been confirmed. Its EPSS score was 3.4% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-22235?

CVE-2021-22235 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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