CVE-2026-91949EPSS p44.8%

CVE-2026-91949CVE-2026-91949

freerdp / freerdp

Description

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.

Scoring

CVSS 9.3 ()
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
EPSS0.56% probability of exploitation · percentile 44.8% · 2026-10-05T12:00:23Z
Last modified2026-09-24
Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.