CVE-2026-6521

MediumCVSS 5.5/10Last modified Nov 11, 2026

Description

OpenFlow v5 protocol dissector infinite loops 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 5.5/10CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-835

Affected software

Vendor	Product	Versions
Wireshark Foundation	Wireshark	>= 4.6.0, < 4.6.5; >= 4.4.0, < 4.4.15

References

https://gitlab.com/wireshark/wireshark/-/work_items/21182Exploit, Issue Tracking, Third Party Advisory
https://gitlab.com/wireshark/wireshark/-/work_items/21188Exploit, Issue Tracking, Third Party Advisory
https://www.wireshark.org/security/wnpa-sec-2026-39.htmlVendor Advisory

Timeline

Published: Apr 30, 2026
Last modified: Nov 11, 2026
NVD status: Analyzed

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