Freerdp CVE-2026-23948
HIGHCVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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3DescriptionNVD
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.22.0, a NULL pointer dereference vulnerability in rdp_write_logon_info_v2() allows a malicious RDP server to crash FreeRDP proxy by sending a specially crafted LogonInfoV2 PDU with cbDomain=0 or cbUserName=0. This vulnerability is fixed in 3.22.0.
AnalysisAI
FreeRDP proxy versions prior to 3.22.0 are vulnerable to denial of service when processing specially crafted RDP server responses that trigger a null pointer dereference in the logon information handler. An unauthenticated attacker controlling a malicious RDP server can crash the FreeRDP proxy by sending a LogonInfoV2 PDU with empty domain or username fields. …
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RemediationAI
Within 24 hours: Inventory all systems running FreeRDP and assess exposure in production environments. Within 7 days: Apply vendor patch 3.22.0 or later to all affected FreeRDP instances; prioritize proxy servers first. …
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