CVE-2026-23948

HIGH
2026-02-09 [email protected]
7.5
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

3
Analysis Generated
Mar 12, 2026 - 21:54 vuln.today
Patch Released
Feb 10, 2026 - 15:09 nvd
Patch available
CVE Published
Feb 09, 2026 - 19:15 nvd
HIGH 7.5

Tags

Null Pointer Dereference Denial Of Service Freerdp Redhat Suse

Description

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.

Analysis

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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Remediation

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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Priority Score

38
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +38
POC: 0

Vendor Status

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CVE-2026-23948 vulnerability details – vuln.today
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