CVE-2026-23948 MEDIUM

CVE-2026-23948: FreeRDP has a NULL Pointer Dereference in rdp_write_logon_info_v2()

Vendor Freerdp
Product FreeRDP
Weakness CWE-476
Published February 9, 2026
Last update February 10, 2026
View on NVD All CVEs

CVSS base score

6.9/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

February 9, 2026 CVE published
February 10, 2026 Record updated