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Freerdp CVE-2026-40254

| EUVDEUVD-2026-25381 MEDIUM
Off-by-one Error (CWE-193)
2026-04-24 GitHub_M
4.2
CVSS 3.1 · GitHub Advisory
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Severity by source

GitHub Advisory PRIMARY
4.2 MEDIUM
AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
SUSE
MEDIUM
qualitative
Red Hat
6.1 MEDIUM
qualitative

Primary rating from GitHub Advisory.

CVSS VectorGitHub Advisory

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

Lifecycle Timeline

6
Patch released
Apr 27, 2026 - 17:44 nvd
Patch available
Patch available
Apr 24, 2026 - 05:01 EUVD
Analysis Generated
Apr 24, 2026 - 03:31 vuln.today
EUVD ID Assigned
Apr 24, 2026 - 03:00 euvd
EUVD-2026-25381
Analysis Generated
Apr 24, 2026 - 03:00 vuln.today
CVE Published
Apr 24, 2026 - 02:24 nvd
MEDIUM 4.2

DescriptionGitHub Advisory

FreeRDP is a free implementation of the Remote Desktop Protocol. Versions prior to 3.25.0 have an off-by-one in the path traversal filter in channels/drive/client/drive_file.c. The contains_dotdot() function catches ../ and ..\ mid-path but misses .. when it's the last component with no trailing separator. A rogue RDP server can read, list, or write files one directory above the client's shared folder through RDPDR requests. This requires the victim to connect with drive redirection enabled. Version 3.25.0 patches the issue.

AnalysisAI

FreeRDP versions prior to 3.25.0 allow path traversal attacks through an off-by-one error in the drive redirection filter, enabling rogue RDP servers to read, list, or write files one directory above the client's shared folder via RDPDR requests. Exploitation requires the victim to connect with drive redirection enabled and interact with a malicious RDP server, making this a user-interaction-dependent remote attack with moderate CVSS score (4.2) but real-world impact limited by connection and configuration requirements.

CVE-2026-25997 CRITICAL POC
9.8 Feb 25

Use-after-free in FreeRDP xf_clipboard_format_equal before 3.23.0. Clipboard format comparison uses freed memory. Fifth

CVE-2026-25953 CRITICAL POC
9.8 Feb 25

Use-after-free in FreeRDP xf_AppUpdateWindowFromSurface before 3.23.0. Surface-to-window update triggers memory corrupti

CVE-2026-25952 CRITICAL POC
9.8 Feb 25

Use-after-free in FreeRDP xf_SetWindowMinMaxInfo before version 3.23.0. X11 client window management triggers memory cor

CVE-2026-25959 CRITICAL POC
9.8 Feb 25

Use-after-free in FreeRDP xf_cliprdr_provide_data clipboard handling before 3.23.0. Clipboard data exchange triggers mem

CVE-2026-22857 CRITICAL POC
9.8 Jan 14

FreeRDP IRP thread handler has a use-after-free where the IRP is freed by Complete() then accessed on the error path. Fi

CVE-2026-22854 CRITICAL POC
9.8 Jan 14

FreeRDP drive read heap overflow when server-controlled read length exceeds IRP output buffer. Fixed in 3.20.1. PoC avai

CVE-2026-22852 CRITICAL POC
9.8 Jan 14

FreeRDP client before 3.20.1 has a heap buffer overflow in AUDIN format processing. A malicious RDP server can corrupt m

CVE-2026-25955 CRITICAL POC
9.8 Feb 25

Use-after-free in FreeRDP xf_AppUpdateWindowFromSurface before 3.23.0. Different code path from CVE-2026-25953. PoC and

CVE-2024-32041 CRITICAL POC
9.8 Apr 22

FreeRDP is a free implementation of the Remote Desktop Protocol. Rated critical severity (CVSS 9.8), this vulnerability

CVE-2023-40574 CRITICAL POC
9.8 Aug 31

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. Rated critical

CVE-2023-40569 CRITICAL POC
9.8 Aug 31

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. Rated critical

CVE-2023-40567 CRITICAL POC
9.8 Aug 31

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. Rated critical

Vendor StatusVendor

SUSE

Severity: Medium
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Fixed
SUSE Linux Enterprise Desktop 15 SP7 Fixed
SUSE Linux Enterprise Module for Package Hub 15 SP7 Fixed
SUSE Linux Enterprise Module for Package Hub 15 SP7 Fixed
SUSE Linux Enterprise Server 15 SP7 Fixed

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CVE-2026-40254 vulnerability details – vuln.today

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