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MsQuic: Improper Certificate Validation in Microsoft.Native.Quic.MsQuic.OpenSSL

Collected exploitation and prediction evidence

Risk source coverage

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

CVE-2026-105794

Exact risk observation. Current source statements above are a separate evidence layer. Latest risk evidence.

No KEV entry is attached to this observation; this is not evidence that exploitation is absent.

FIRST EPSS: 1.00 % · percentile 62.76 % · scored 29 Oct 2026. Retained older prediction.

Observed 29 Oct 2026 18:29:26 UTC · Complete immutable risk JSON

Immutable source observations

11 recorded revisions

Each citation identifies one complete source statement. Source modification dates and the time this installation observed them are distinct. Latest history includes records historically associated by source identifiers; a removed alias is not a current equivalence claim. Exact citations show that source record's own earlier observations. Failed reads and unchanged polls do not rewrite history.

11 Nov 2026 05:31:11 UTC

MsQuic is a cross-platform C implementation of the IETF QUIC protocol exposed to C, C++, C#, and Rust. Prior to 2.4.20, 2.5.11, and 2.6.1, MsQuic clients using the OpenSSL or QuicTLS TLS backend do not properly verify that a server certific…

euvd · EUVD-2026-93422 · Published

9 Nov 2026 05:05:29 UTC

MsQuic is a cross-platform C implementation of the IETF QUIC protocol exposed to C, C++, C#, and Rust. Prior to 2.4.20, 2.5.11, and 2.6.1, MsQuic clients using the OpenSSL or QuicTLS TLS backend do not properly verify that a server certific…

euvd · EUVD-2026-93422 · Published

7 Nov 2026 04:29:03 UTC

MsQuic is a cross-platform C implementation of the IETF QUIC protocol exposed to C, C++, C#, and Rust. Prior to 2.4.20, 2.5.11, and 2.6.1, MsQuic clients using the OpenSSL or QuicTLS TLS backend do not properly verify that a server certific…

euvd · EUVD-2026-93422 · Published

5 Nov 2026 03:56:15 UTC

MsQuic is a cross-platform C implementation of the IETF QUIC protocol exposed to C, C++, C#, and Rust. Prior to 2.4.20, 2.5.11, and 2.6.1, MsQuic clients using the OpenSSL or QuicTLS TLS backend do not properly verify that a server certific…

euvd · EUVD-2026-93422 · Published

3 Nov 2026 02:59:27 UTC

MsQuic is a cross-platform C implementation of the IETF QUIC protocol exposed to C, C++, C#, and Rust. Prior to 2.4.20, 2.5.11, and 2.6.1, MsQuic clients using the OpenSSL or QuicTLS TLS backend do not properly verify that a server certific…

euvd · EUVD-2026-93422 · Published

1 Nov 2026 02:07:02 UTC

MsQuic is a cross-platform C implementation of the IETF QUIC protocol exposed to C, C++, C#, and Rust. Prior to 2.4.20, 2.5.11, and 2.6.1, MsQuic clients using the OpenSSL or QuicTLS TLS backend do not properly verify that a server certific…

euvd · EUVD-2026-93422 · Published

30 Oct 2026 01:51:04 UTC

MsQuic is a cross-platform C implementation of the IETF QUIC protocol exposed to C, C++, C#, and Rust. Prior to 2.4.20, 2.5.11, and 2.6.1, MsQuic clients using the OpenSSL or QuicTLS TLS backend do not properly verify that a server certific…

euvd · EUVD-2026-93422 · Published

28 Oct 2026 00:48:12 UTC

MsQuic is a cross-platform C implementation of the IETF QUIC protocol exposed to C, C++, C#, and Rust. Prior to 2.4.20, 2.5.11, and 2.6.1, MsQuic clients using the OpenSSL or QuicTLS TLS backend do not properly verify that a server certific…

euvd · EUVD-2026-93422 · Published

25 Oct 2026 04:17:29 UTC

MsQuic is a cross-platform C implementation of the IETF QUIC protocol exposed to C, C++, C#, and Rust. Prior to 2.4.20, 2.5.11, and 2.6.1, MsQuic clients using the OpenSSL or QuicTLS TLS backend do not properly verify that a server certific…

nvd · CVE-2026-105794 · Published

23 Oct 2026 16:01:25 UTC

MsQuic: Improper Certificate Validation in Microsoft.Native.Quic.MsQuic.OpenSSL

osv · GHSA-w5f4-fx9m-m4q7 · Published

23 Oct 2026 15:48:27 UTC

MsQuic: Improper Certificate Validation in Microsoft.Native.Quic.MsQuic.OpenSSL

cve-program · CVE-2026-105794 · Published

ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 11 Nov 14:12 UTC · 274 of 275 readable · 273 fully read · documentation 469/469 current