CVE-2026-33952

MEDIUM

6.5

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.

CVE Details

CVSS v3.1 Score6.5

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionREQUIRED

Published3/30/2026

Last Modified4/2/2026

Sourcenvd

Honeypot Sightings0

Affected Products

freerdp:freerdp

Weaknesses (CWE)

CWE-617

References

https://github.com/FreeRDP/FreeRDP/commit/4ac0b6467d371a1ad47c1f751c5b305e4c068adb(security-advisories@github.com)

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4v4p-9v5x-hc93(security-advisories@github.com)

IOC Correlations

No correlations recorded

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