What is CVE-2026-53221?

CVE-2026-53221 is a security advisory published by Microsoft Security Response Center (MSRC) with Medium severity. ip6_vti: fix incorrect tunnel matching in vti6_tnl_lookup()

Which CVE IDs does CVE-2026-53221 cover?

CVE-2026-53221 covers the following CVE IDs: CVE-2026-53221. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-53221?

CVE-2026-53221 has a CVSS v3 base score of 5.5, published by Microsoft Security Response Center (MSRC).

CVE-2026-53221MediumCVSS 5.5

ip6_vti: fix incorrect tunnel matching in vti6_tnl_lookup()

Vendor

Microsoft Security Response Center (MSRC)

Published

June 30, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-53221 →