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CVE-2026-91949

FreeRDP 3.0.0 through 3.30.0 Protocol Negotiation Bypass

CVSS 4.0 9.2 CRITICALCVSS 3.1 9.3 CRITICALCheck source for fixed versionsKEV status unknown
Original advisory

cve-program · CVE-2026-91949

Published

FreeRDP server versions before 3.31.0 contain a protocol negotiation bypass vulnerability that allows unauthenticated attackers to establish RDSTLS connections despite server policy disabling them. Attackers can send incompatible protocol requests, receive negotiation failures, then complete TLS handshake and enter RDSTLS to bypass pre-authentication transport restrictions.

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Affected versions, risk and source history

Related advisories and sources

Publishers link these advisories through the identifiers shown below. A shared identifier or date alone does not tell you whether your software is affected or whether the advisories describe the same cause.

CVE-2026-91949 · CVE overview and exploitation status

cve-program · CVE-2026-91949

Related changes

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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 13 Nov 05:08 UTC · 274 of 275 readable · 272 fully read · documentation 469/469 current

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