What is CVE-2025-21864?

CVE-2025-21864 is a security advisory published by Microsoft Security Response Center (MSRC) with Medium severity. tcp: drop secpath at the same time as we currently drop dst

Which CVE IDs does CVE-2025-21864 cover?

CVE-2025-21864 covers the following CVE IDs: CVE-2025-21864. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2025-21864?

CVE-2025-21864 has a CVSS v3 base score of 5.5, published by Microsoft Security Response Center (MSRC).

CVE-2025-21864MediumCVSS 5.5

tcp: drop secpath at the same time as we currently drop dst

Vendor

Microsoft Security Response Center (MSRC)

Published

July 11, 2026

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2025-21864 →