Reachable assertion in FreeRDP - #VU137841
Published: July 16, 2026
Vulnerability identifier: #VU137841
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: N/A
CWE-ID: CWE-617
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: FreeRDP
Affected software:
FreeRDP
FreeRDP
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to reachable assertion in serial_process_irp_device_control() in FreeRDP serial redirection handling when processing a server-supplied IRP_MJ_DEVICE_CONTROL request. A remote attacker can send a specially crafted request to cause a denial of service.
Serial port redirection must be enabled, and user interaction is required to connect the client to a malicious or compromised RDP server.
Remediation
Install security update from vendor's website.