CVE-2026-5406
MEDIUMCVSS 5.5/10EPSS 0.18%
Last modified
CVE-2026-5406 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. FC-SWILS protocol dissector crash in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service. EPSS estimates a 0.18% chance of exploitation in the next 30 days.
Description
FC-SWILS protocol dissector crash in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service
Metrics
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Wireshark | Wireshark | >= 4.4.0, <= 4.4.14 |
| Wireshark | Wireshark | >= 4.6.0, <= 4.6.4 |
References
- https://gitlab.com/wireshark/wireshark/-/issues/21070Exploit, Issue Tracking
- https://www.wireshark.org/security/wnpa-sec-2026-10.htmlVendor Advisory
- https://gitlab.com/wireshark/wireshark/-/work_items/21070Issue Tracking, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-5406?
FC-SWILS protocol dissector crash in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service
How severe is CVE-2026-5406?
CVE-2026-5406 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.18% probability of exploitation in the next 30 days.
How do I fix CVE-2026-5406?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-54052n8n-MCP is an MCP server that provides AI assistants access …9.9
- CVE-2026-54055Kitty is a cross-platform GPU based terminal. In versions pr…5
- CVE-2026-54056Kitty is a cross-platform GPU based terminal. In versions 0.…7.1
- CVE-2026-54057Kitty is a cross-platform GPU based terminal. In versions pr…7.8
- CVE-2026-54058Pillow is a Python imaging library. Prior to 12.3.0, when Pi…9.1
- CVE-2026-54059Pillow is a Python imaging library. Prior to 12.3.0, PIL/Pcf…7.5
- CVE-2026-54060Pillow is a Python imaging library. Prior to 12.3.0, PIL/Fon…7.5
- CVE-2026-54061Dgraph is an open source distributed GraphQL database. Prior…9.1
- CVE-2026-54063Excelize is a Go language library for reading and writing Mi…7.5
- CVE-2026-54066SiYuan is an open-source personal knowledge management syste…7.5
- CVE-2026-54067SiYuan is an open-source personal knowledge management syste…9.9
- CVE-2026-54068SiYuan is an open-source personal knowledge management syste…5.9
Are you affected by CVE-2026-5406?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST