CVE-2026-23948

MEDIUM EPSS 37.0%
Published Feb 9, 20264mo ago · Modified Feb 10, 20264mo ago
6.9 CVSS 4.0
Medium
Find Similar
Published Feb 9, 2026 4mo ago
Last Modified Feb 10, 2026 4mo ago

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.

CVSS Details

Base Score
6.9
Exploitability
—
Impact
—
Vector string
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
37.0% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 1

VendorProductVersionRange
freerdpfreerdp* <3.22.0

References 2

  • github.com https://github.com/FreeRDP/FreeRDP/commit/4d44e3c097656a8b9ec696353647b0888ca45860
    Patch
  • github.com https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-6f3c-qvqq-2px5
    PatchVendor Advisory

Remediation

  • github.com https://github.com/FreeRDP/FreeRDP/commit/4d44e3c097656a8b9ec696353647b0888ca45860
    Patch
  • github.com https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-6f3c-qvqq-2px5
    PatchVendor Advisory