Denial of Service Vulnerability in Wireshark by Wireshark Foundation
CVE-2026-5406

5.5MEDIUM

Key Information:

Vendor

Wireshark
Status
Wireshark
Vendor
CVE Published:
30 April 2026

What is CVE-2026-5406?

A vulnerability in Wireshark's FC-SWILS protocol dissector allows attackers to exploit specific versions (4.6.0 to 4.6.4 and 4.4.0 to 4.4.14), leading to a denial of service condition. When processed by the affected versions, malformed FC-SWILS packets can cause the application to crash, disrupting network analysis and monitoring tasks.

Affected Version(s)

Wireshark 4.6.0 < 4.6.5

Wireshark 4.4.0 < 4.4.15

References

https://www.wireshark.org/security/wnpa-sec-2026-10.html
https://gitlab.com/wireshark/wireshark/-/issues/21070
issue-trackingpermissions-required

CVSS V3.1

Score:
5.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Brendan Coles
.