CVE-2026-5402
HIGHCVSS 8.8/10EPSS 0.39%
Last modified
CVE-2026-5402 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. TLS protocol dissector heap overflow in Wireshark 4.6.0 to 4.6.4 allows denial of service and possible code execution. EPSS estimates a 0.39% chance of exploitation in the next 30 days.
Description
TLS protocol dissector heap overflow in Wireshark 4.6.0 to 4.6.4 allows denial of service and possible code execution
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Wireshark | Wireshark | >= 4.6.0, <= 4.6.4 |
References
- https://gitlab.com/wireshark/wireshark/-/issues/21090Exploit, Issue Tracking
- https://www.wireshark.org/security/wnpa-sec-2026-14.htmlVendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2026-5402?
TLS protocol dissector heap overflow in Wireshark 4.6.0 to 4.6.4 allows denial of service and possible code execution
How severe is CVE-2026-5402?
CVE-2026-5402 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.39% probability of exploitation in the next 30 days.
How do I fix CVE-2026-5402?
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-2026-5402?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST