What is CVE-2026-54891?

CVE-2026-54891 is a security advisory published by Microsoft Security Response Center (MSRC) with Medium severity. Plaintext APPLICATION_DATA injected during TLS handshake delivered to client application post-handshake in ssl

Which CVE IDs does CVE-2026-54891 cover?

CVE-2026-54891 covers the following CVE IDs: CVE-2026-54891. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

CVE-2026-54891Medium

Plaintext APPLICATION_DATA injected during TLS handshake delivered to client application post-handshake in ssl

Vendor

Microsoft Security Response Center (MSRC)

Published

July 7, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-54891 →