Type Confusion in FreeRDP - #VU131102
Published: May 12, 2026
Vulnerability identifier: #VU131102
CSH Severity: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: N/A
CWE-ID: CWE-843
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 an out-of-bounds read.
The vulnerability exists due to type confusion in the RDPEAR NDR parser when processing crafted RDPEAR NDR data from an RDP server. A remote attacker can reuse a non-null NDR pointer ref-id across fields with incompatible expected NDR types to cause an out-of-bounds read.
User interaction is required because the client must connect to a malicious or compromised RDP server, and exploitation is reachable when RDPEAR or Remote Credential Guard is in use.
Remediation
Install security update from vendor's website.