CVE-2026-33952

Medium

Description

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, an unvalidated auth_length field read from the network triggers a WINPR_ASSERT() failure in rts_read_auth_verifier_no_checks(), causing any FreeRDP client connecting through a malicious RDP Gateway to crash with SIGABRT. This is a pre-authentication denial of service affecting all FreeRDP clients using RPC-over-HTTP gateway transport. The assertion is active in default release builds (WITH_VERBOSE_WINPR_ASSERT=ON). This issue has been patched in version 3.24.2.

SeverityMedium

CVSS6.5

Exploit probability—

ProductFreerdp

PublishedMar 30, 2026

First seenMar 30, 2026

Weakness typeCWE-617CWE-617

How to fix

Update

freerdp freerdp3.24.2 or later

Affected products

Product	Affected versions	Fixed in
freerdp freerdp	v < 3.24.2	3.24.2

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