CVE-2026-5407
MEDIUMCVSS 5.5/10EPSS 0.14%
Last modified
CVE-2026-5407 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. SMB2 protocol dissector infinite loop in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service. EPSS estimates a 0.14% chance of exploitation in the next 30 days.
Description
SMB2 protocol dissector infinite loop in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service
Metrics
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/21073Exploit, Issue Tracking
- https://www.wireshark.org/security/wnpa-sec-2026-11.htmlVendor Advisory
- https://gitlab.com/wireshark/wireshark/-/work_items/21073Issue Tracking, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-5407?
SMB2 protocol dissector infinite loop 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-2026-5407?
CVE-2026-5407 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.14% probability of exploitation in the next 30 days.
How do I fix CVE-2026-5407?
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.
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Are you affected by CVE-2026-5407?
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Scan your code nowSource: NVD / NIST