Is CVE-2026-6521 actively exploited?

CVE-2026-6521 has no public evidence of in-the-wild exploitation as of 2026-04-30.

What is the CVSS score for CVE-2026-6521?

CVE-2026-6521 has a CVSS score of 5.5 (MEDIUM severity). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

Vendor patch guidance is linked from the references on this page. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-6521.

Affected products for CVE-2026-6521 are listed on this page once vendor data becomes available.

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

Primary Vendor: UNKNOWN
Published: 4/30/2026
Last Modified: 4/30/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.