#VU125373 Reachable assertion in FreeRDP - CVE-2026-33952
Published: April 8, 2026
Vulnerability identifier: #VU125373
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-33952
CWE-ID: CWE-617
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
FreeRDP
FreeRDP
Software vendor:
FreeRDP
FreeRDP
Description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to reachable assertion in rts_read_auth_verifier_no_checks() in libfreerdp/core/gateway/rts.c when processing RPC-over-HTTP gateway PDUs. A remote attacker can send a specially crafted PDU with an invalid auth_length field to cause a denial of service.
The issue is reachable during connection setup before authentication and affects clients using RDP Gateway transport.
Remediation
Install security update from vendor's website.